Prof. Valeriu POPA Department of Mathematics and Informatics · - 1 1 - - Prof. Valeriu POPA...

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- 1 - Prof. Valeriu POPA Department of Mathematics and Informatics List of papers General Topology 1973 1. V. Popa, Asupra aplicaţiilor monotone între spaţiile bitopologice (On monotone functions between bitopological spaces), Stud. Cerc. Matem., 25, 2 (1973), 309 – 312. 2. V. Popa and C. Stan, Asupra unei descompuneri a cvasicontinuităţii în spaţiile topologice (On a decomposition of cvasicontinuity in topological spaces), Stud. Cerc. Matem., 25, 1 (1973), 41 – 43. 1975 3. V. Popa, Asupra unei descompuneri a cvasicontinuităţii multifuncţiilor (On a decomposition of cvasicontinuity for multifunctions), Stud. Cerc. Matem., 27, 3 (1975), 323 – 328. 4. V. Popa, Multifunctions and bitopological spaces, Bul. Soc. Şt. Mat. România, 19 (67), 1 – 2 (1975), 147 – 152. 1976 5. V. Popa, Asupra M – produselor bitopologice conexe (On M – bitopological conexe products), Bul. Şt. Tehnic, Inst. Politehn. “T. Vuia”, Timişoara, Ser. Mat. Fiz. Mec. Teor. Aplicată, 2 (35) (1976), 134 – 140. 1978 6. V. Popa, Asupra unei descompuneri a cvasicontinuităţii în spaţiile topologice (On a decomposition of quasicontinuity in topological spaces), Stud. Cerc. Mat., 30, 1 (1978), 31 – 35. 7. V. Popa, Asupra unor proprietăţi ale multifuncţiilor cvasicontinue şi aproape continue (On some properties of quasicontinuous and almost continuous multifunctions), Stud. Cerc. Mat., 30, 4 (1978), 441 – 446. 8. V. Popa, Asupra Weakly continuous multifunctions, Bull. U. M. I. 5, 15 – A, (1978), 379 – 388. 1979 9. V. Popa, Sur certain decomposition de la continuité dans les espaces topologique, Glasnik Mat. 14 (34) (1979), 361 – 364. 10. V. Popa, On some properties of bitopological semi – separate spaces, Mat. Vesnik, 3 (16) (31) (1979), 71 – 75. 1980 11. V. Popa, Multifuncţii H – aproape continue (Multifunctions H – almost continuous), Stud. Cerc. Mat. 32, 1 (1980), 103 – 109.

Transcript of Prof. Valeriu POPA Department of Mathematics and Informatics · - 1 1 - - Prof. Valeriu POPA...

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Prof. Valeriu POPA DDeeppaarrttmmeenntt ooff MMaatthheemmaattiiccss aanndd IInnffoorrmmaattiiccss

List of papers

General Topology

11997733 1. V. Popa, Asupra aplicaţiilor monotone între spaţiile bitopologice (On monotone

functions between bitopological spaces), Stud. Cerc. Matem., 25, 2 (1973), 309 – 312.

2. V. Popa and C. Stan, Asupra unei descompuneri a cvasicontinuităţii în spaţiile topologice (On a decomposition of cvasicontinuity in topological spaces), Stud. Cerc. Matem., 25, 1 (1973), 41 – 43.

11997755 3. V. Popa, Asupra unei descompuneri a cvasicontinuităţii multifuncţiilor (On a

decomposition of cvasicontinuity for multifunctions), Stud. Cerc. Matem., 27, 3 (1975), 323 – 328.

4. V. Popa, Multifunctions and bitopological spaces, Bul. Soc. Şt. Mat. România, 19 (67), 1 – 2 (1975), 147 – 152.

11997766 5. V. Popa, Asupra M – produselor bitopologice conexe (On M – bitopological conexe

products), Bul. Şt. Tehnic, Inst. Politehn. “T. Vuia”, Timişoara, Ser. Mat. Fiz. Mec. Teor. Aplicată, 2 (35) (1976), 134 – 140.

11997788 6. V. Popa, Asupra unei descompuneri a cvasicontinuităţii în spaţiile topologice (On a

decomposition of quasicontinuity in topological spaces), Stud. Cerc. Mat., 30, 1 (1978), 31 – 35.

7. V. Popa, Asupra unor proprietăţi ale multifuncţiilor cvasicontinue şi aproape continue (On some properties of quasicontinuous and almost continuous multifunctions), Stud. Cerc. Mat., 30, 4 (1978), 441 – 446.

8. V. Popa, Asupra Weakly continuous multifunctions, Bull. U. M. I. 5, 15 – A, (1978), 379 – 388.

11997799 9. V. Popa, Sur certain decomposition de la continuité dans les espaces topologique,

Glasnik Mat. 14 (34) (1979), 361 – 364. 10. V. Popa, On some properties of bitopological semi – separate spaces, Mat. Vesnik, 3

(16) (31) (1979), 71 – 75. 11998800 11. V. Popa, Multifuncţii H – aproape continue (Multifunctions H – almost continuous),

Stud. Cerc. Mat. 32, 1 (1980), 103 – 109.

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12. V. Popa, Caracterizări ale funcţiilor θ – continue (Characterizations of θ – continuous functions), Studii şi Cercetări (Matem.), Bacău (1980), 113 – 119.

13. V. Popa, On some properties of weakly continuous multifunctions, Stud. Cerc. (Matem.), Bacău (1980), 121 – 127.

11998811 14. V. Popa, Asupra unor forme slăbite de continuitate (On some weak forms of

continuity), Stud. Cerc. Mat., 33, 5 (1981), 543 – 546. 11998822 15. V. Popa, Caracterizări ale funcţiilor slab continue (Characterizations of weak

continuous functions), Stud. Cerc. Mat., 34, 3 (1982), 277 – 280. 16. V. Popa, Multifunctions semi – continuous, Rev. Roumaine Math. Pure et Appl., 27,

7 (1982), 807 – 815. 17. V. Popa, Almost continuous multifunctions, Mat. Vesnik, 6 (19), (34) (1982), 75 –

84. 18. V. Popa, Multifuncţii slab continue definite pe spaţii bitopologice (Weak continuous

multifunctions defined on bitopological spaces), Stud. Cerc. Mat. 34, 6 (1982), 561 – 567.

19. V. Popa, Multifuncţii tari continue (Strong continuous multifunctions), Bul. St. Tehn. Inst. Politehn. “Traian Vuia”, Timişoara, Ser. Mat. Fiz. 27 (41), 1 (1982), 5 – 7.

11998833 20. V. Popa, Asupra unor condiţii de continuitate pentru multifuncţii (On some

continuity conditions for multifunctions), Stud. Cerc. Mat. 35, 1 (1983), 46 – 51. 21. V. Popa, Asupra unor condiţii suficiente de cvasicontinuitate superioară (On some

sufficient conditions of superior quasicontinuity), Studii şi Comunicări Şt. I. I. S. Bacău (1983), 119 – 123.

22. V. Popa, Asupra unor multifuncţii care păstrează conexiunea dintre mulţimi (On some multifunctions that keeps the conexion between sets), Studii şi Comunicări Şt. I. I. S. Bacău (1983), 109 – 116.

23. V. Popa, Some properties of almost continuous multifunctions, Mat. Vesnik, 35 (1983), 425 – 432.

11998844 24. V. Popa, On some weakened forms of continuity for multifunctions, Mat. Vesnik 36

(1984), 339 – 350. 11998855 25. V. Popa, Unele caracterizări ale multifuncţiilor cvasicontinue şi slab continue (Some

characterizations of quasi – and weak continuous multifunctions), Stud. Cerc. Mat. 37, 1 (1985), 77 – 82.

26. V. Popa, Sur certaines formes faibles de continuité pour les multifunctions, Rev. Roumanie Math. Pure Appl. 30 (1985), 539 – 546.

27. V. Popa, On characterizations of feebly continuous functions, Mathematica, 27 (1985), 167 – 170.

28. V. Popa, On almost continuous multifunctions, Rev. Research, Math. Sciences, Novi Sad Univ., 15, 1 (1985), 145 – 154.

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11998866 29. V. Popa, Quasi proper sets and quasi almost continuity in bitopological spaces, Stud.

Cercet. Bacău (1986), 185 – 187. 11998877 30. V. Popa, Properties of H – almost continuous functions, Bull. Math. Soc. Sci. Math.

R. S. Roumanie, 31 (79), 2 (1987), 163 – 168. 31. V. Popa, Asupra unei relaţii comune pentru unele forme de continuitate (On a

common relation for some continuity forms), Stud. Cerc. Şt. Bacău (1987), 80 – 83. 32. V. Popa, Characterizations of H – almost continuous functions, Glasnik Mat. 22 (42)

(1987), 157 – 161. 33. V. Popa, On the almost continuity of the limits for sets of multifunctions, An. Univ.

Timişoara, Set. Matem. 25, 2 (1987), 71 – 78. 11998888 34. V. Popa, On characterizations of irresolute multifunctions, J. Univ. Kuwait (Sci.), 15

(1988), 21 – 26. 35. V. Popa, Funcţii Ti – slab continue (Ti – weak continuous functions), Lucrările Ses.

Jubiliare de comunicări Ştiinţifice Iaşi, Vol. 5 (1988), 173 – 176. 36. V. Popa, Some properties of semi – weakly continuous mappings, Stud. Cerc. Mat.

40, 6 (1988), 523 – 528. 37. T. Noiri and V. Popa, Weakly quasicontinuous multifunctions, Anal. Univ.

Timişoara, Ser. Mat. 26, 2 (1988), 33 – 38. 11998899 38. V. Popa, Sur les multifunctions faiblement continues et H – presque continue,

Demonstratio Math. 22, 2 (1989), 273 – 283. 39. V. Popa and T. Noiri, On weakly quasicontinuous functions, Glasnik Matem. 24 (44)

(1989), 381 – 399. 40. V. Popa, Some properties of rarely continuous multifunctions, Lucrările Conf.

Naţionale de Geometrie şi Topologie, Suceava, 6 – 9 octombrie 1988, Univ. Al. I. Cuza Iaşi, 1989, 269 – 274.

11999900 41. T. Noiri and V. Popa, On some forms of continuity for multifunctions, Res. Report

Yetsushiro Nat. College Techi. 12 (1990), 65 – 70. 42. V. Popa, On almost quasicontinuous functions, Lucrările Ştiinţifice, Ser. Mat. Fiz.

IPG – Ploieşti (1990), 64 – 70. 43. V. Popa, On some properties of quasi semi-separate spaces, Lucrările Ştiinţifice, Ser.

Mat. Fiz. IPG – Ploieşti (1990), 71 – 76. 44. V. Popa, Some properties of H – almost continuous multifunctions, Problemy

Matematyczne, 1 (1988), 9 – 26 (appeared in 1990). 45. T. Noiri and V. Popa, Weak forms of faint continuity, Bull. Math. Soc. Sci. Mat. R.

S. Roumanie, 34 (82), 3 (1990), 263 – 270. 46. V. Popa, Irresolute multifunctions, Intern. J. Math. Math. Sci. 13 (1990), 275 – 280. 47. V. Popa, Properties of rarely continuous functions, Mathematica, 32 (55), 1 (1990),

77 – 80. 48. V. Popa, On feebly continuous functions, Studia Univ. Babeş – Bolyai, Ser. Math.

35, 1 (1990), 25 – 29.

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49. V. Popa, Some properties of almost feebly continuous functions, Demonstratio Math. 23, 4 (1990), 985 – 991.

50. V. Popa, Weak continuity and almost continuity for multifunctions, Sb. Rad. Prisad Mat. Fac. Ser. Mat. 20, 1 (1990), 185 – 193 (Novi Sad).

11999911 51. V. Popa, On weak forms of continuity of multifunctions, Stud. Cerc. Şt. Univ. Bacău,

1 (1991), 89 – 91. 52. T. Noiri and V. Popa, Some properties of quasicontinuous functions, Anal. Univ.

Timişoara, 29, 1 (1991), 65 – 71. 53. V. Popa and T. Noiri, Some properties of irresolute multifunctions, Mat. Vesnik 43

(1991), 11 – 17. 54. V. Popa, A note on weakly and almost continuous multifunctions, Zb. Rad. Prisad

Mat. Fac. Ser. Mat. 21, 2 (1991), 31 – 38. 11999922 55. T. Noiri and V. Popa, On strongly irresolute multifunctions, Res. Report Yatsushiro

Nat. College Techn. 14 (1992), 75 – 79. 56. V. Popa and T. Noiri, On upper and lower weakly quasi – continuous multifunctions,

Rev. Roumaine Math. Pure Appl. 37, 6 (1992), 499 – 508. 57. T. Noiri and V. Popa, On upper and lower θ – irresolute multifunctions, Indian J.

Math., 34 (1992), 247 – 257. 58. V. Popa, Inter – relations among multifunctions defined on bitopological spaces,

Rev. Anal. Numerique and Theory of Approx. 21 (1992), 69 – 74. 59. V. Popa, On characterizations of almost continuous multifunctions, Stud. Cerc. Şt.

Ser. Mat., Univ. Bacău, 2 (1992), 115 – 118. 60. V. Popa, Some conditions for continuity of almost continuous multifunctions, Rend.

Inst. Mat. Univ. Trieste, Fasc. I, II, 24 (1992), 19 – 23. 61. V. Popa, On the quasicontinuity for multifunctions, Anal. Univ. Timişoara 30 (1992),

283 – 288. 11999933 62. V. Popa and T. Noiri, Almost weakly continuous functions, Demonstratio Math. 25,

1 – 2 (1993), 241 – 251. 63. T. Noiri and V. Popa, Characterization of almost quasi continuous multifunctions,

Res. Report Yatsushiro Nat. Coll. Tech. 15 (1993), 97 – 101. 64. V. Popa and T. Noiri, On β – continuous functions, Real Analysis Exchange, 18 (2),

1992 / 1993, 2, 544 – 548. 65. T. Noiri and V. Popa, Properties of s – quasi continuous multifunctions, Far East J.

Math. Sci. 1 (1) (1993), 83 – 89. 66. V. Popa, T. Noiri, M. Ganster and K. Dlaska, On upper and lower weakly θ –

irresolute multifunctions, J. Inst. Math. and Computer Sci. (Math. Ser.) 6, 2 (1993), 137 – 149.

67. V. Popa and T. Noiri, On upper and lower α – continuous multifunctions, Math. Slovaca 43, 4 (1993), 477 – 491.

68. T. Noiri and V. Popa, Almost weakly continuous multifunctions, Demonstratio Math. 26, 2 (1993), 363 – 380.

69. G. I. Chee, T. Noiri and V. Popa, Almost irresolute multifunctions, J. Natural Sci. 3, 2 (1993), 1 – 8.

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70. T. Noiri and V. Popa, On upper and lower almost quasi – continuous multifunctions, Bull. Inst. Math. Acad. Sinica, 21, 4 (1993), 337 – 349.

71. V. Popa, On the set of points at which an almost continuous multifunction is irresolute, St. Cerc. Şt. Ser. Mat., Univ. Bacău, 3 (1993), 115 – 128.

72. T. Noiri and V. Popa, Characterizations of α – continuous multifunctions, Review of Research, Fac. of Sci. Math. Ser. 23, 1 (1993), 29 – 38.

11999944 73. V. Popa, Some properties of weakly quasicontinuous multifunctions, Stud. Cerc. Şt.

Ser. Mat. Univ. Bacău, 4 (1994), 59 – 66. 74. V. Popa and T. Noiri, Weakly β – continuous functions, Anal. Univ. de Vest,

Timişoara, 32, 2 (1994), 83 – 92. 11999955 75. T. Noiri and V. Popa, On θ – quasicontinuous multifunctions, Demonstratio Math.

28, 1 (1995), 111 – 122. 76. T. Noiri and V. Popa, On s – irresolute multifunctions, Bull. Calcutta Math. Soc. 87

(1995), 419 – 424. 77. V. Popa, On almost locally connected spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău,

5 (1995), 77 – 81. 78. V. Popa, Some properties of quasi – irresolute functions, Stud. Cerc. Şt. Ser. Mat.

Univ. Bacău, 5 (1995), 83 – 87. 11999966 79. T. Noiri and V. Popa, On upper and lower α – continuous multifunctions,

Demonstratio Math. 29, 2 (1996), 381 – 396. 80. M. Ganster, V. Popa, T. Noiri, On strongly θ – irresolute multifunctions, J. Math. and

Comput. Sci. (Math. Ser.), 9, 2 (1996), 199 – 205. 81. V. Popa and T. Noiri, Some properties of β – continuous multifunctions, Anal. Şt.

Univ. Al. I. Cuza, Iaşi, Suppl. Secţ. I-a Mat. 42 (1996), 207 – 215. 82. V. Popa, Some properties of δ – continuous multifunctions, Stud. Cerc. Şt. Ser. Mat.

Univ. Bacău, 6 (1996), 163 – 169. 11999977 83. V. Popa, T. Noiri, M. Ganster, On upper and lower almost precontinuous

multifunctions, Far East J. Math. Sci., Special Volume (1997) (Part I), 49 – 68. 84. V. Popa and T. Noiri, On β – continuous multifunctions, Real Anal. Exchange, 22

(1996/1997), 362 – 376. 85. V. Popa and T. Noiri, A note on precontinuity and quasicontinuity for

multifunctions, Demonstratio Math. 30, 2 (1997), 271 – 278. 86. V. Popa and T. Noiri, Characterizations of weakly quasicontinuous functions in

bitopological spaces, Mathematica 39 (62), 2 (1997), 293 – 297. 87. V. Popa, On characterizations of strongly semi – continuous functions, Stud. Cerc.

Şt. Ser. Mat. Univ. Bacău, 7 (1997), 135 – 140. 88. V. Popa, Y. Kuciuc and T. Noiri, On upper and lower preirresolute multifunctions,

Pure and Appl. Mat. Sci. 46, 1 – 2 (1997), 5 – 16. 11999988 89. T. Noiri and V. Popa, Almost precontinuous multifunctions, Res. Report Yatsushiro

Nat. College Techn. 20 (1998), 97 – 104.

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90. T. Noiri and V. Popa, On almost β – continuous functions, Acta Math. Hung. 79 (4) (1998), 329 – 339.

91. V. Popa and T. Noiri, Almost quasicontinuous multifunctions, Tatra Mountain Math. Publ. 14 (1998), 81 – 91.

92. T. Noiri and V. Popa, On g – regular spaces and some functions, Memoire Fac. Sci. Kadri Univ., Math., 20 (1999), 67 – 74.

93. V. Popa and T. Noiri, Almost α – continuous multifunctions, Filomat 12, 1 (1998), 39 – 52.

94. V. Popa and T. Noiri, Properties of upper and lower weakly quasi-continuous multifunctions, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 8 (1998), 97 – 112.

95. V. Popa and T. Noiri, Some properties of upper and lower weakly continuous multifunctions, Anal. Univ. Craiova, Ser. Mat. Inform. 25 (1998), 24 – 30.

11999999 96. T. Noiri and V. Popa, On upper and lower almost β – continuous functions, Acta

Math. Hung. 82 (1999), 57 – 73. 97. T. Noiri and V. Popa, Some properties of almost weakly continuous multifunctions,

Demonstratio Math. 32, 3 (1999), 605 – 614. 98. S. Jafari and V. Popa, Rarely quasi – continuous multifunctions, Anal. Univ.

Timişoara, Ser. Mat. Inform. 37, 2 (1999), 83 – 90. 99. T. Noiri and V. Popa, Properties of weakly precontinuous multifunctions, Istanbul

Univ. J. Math. 57 – 58 (1998 – 1999), 41 – 52. 22000000 100. T. Noiri and V. Popa, Properties of β – continuous functions, Res. Rep. Yatsushiro

Nat. College Techn. 22 (2000), 79 – 84. 101. V. Popa and T. Noiri, On s – precontinuous multifunctions, Demonstratio Math. 33,

3 (2000), 679 – 687. 102. V. Popa and T. Noiri, Some properties of α – irresolute multifunctions, Arab. J.

Math. Sci. 6, 2 (2000), 17 – 26. 103. T. Noiri and V. Popa, On s – β – continuous multifunctions, J. Egypt Math. Soc. 8

(2000), 127 – 137. 104. V. Popa and T. Noiri, On M – continuous functions, Anal. Univ. „Dunărea de Jos”

Galaţi, Ser. Mat. Fiz. Mec. Teor., fasc. II, 18 (23) (2000), 31 – 41. 105. T. Noiri and V. Popa, On upper and lower weakly β – continuous multifunctions,

Anal. Univ. Sci. Budapest, 43 (2000), 25 – 48. 106. V. Popa and T. Noiri, On weakly β – continuous multifunctions, Bul. Şt. Univ.

„Politehnica” – Timişoara, 45 (59), 2 (2000), 1 – 16. 107. T. Noiri and V. Popa, A unified theory for s – continuity of multifunctions, Istanbul

Univ. J. Math. Sci. 59 (2000), 1 – 15. 108. T. Noiri and V. Popa, On upper and lower M – continuous multifunctions, Filomat,

14 (2000), 73 – 86. 22000011 109. V. Popa and T. Noiri, On the definitions of some generalized forms of continuity

under minimal conditions, Memoirs Fac. Sci. Kachi Univ. Ser. Math. 22 (2001), 9 – 18.

110. V. Popa and T. Noiri, On the points of continuity and discontinuity, Bull. U.P.G. – Ploieşti, Ser. Mat. Inform. Fiz. 53, 1 (2001), 95 – 100.

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111. V. Popa and T. Noiri, Slightly m – continuous functions, Radovi Mat., 10, 2 (2001), 219 – 232.

112. V. Popa and T. Noiri, On m – continuous multifunctions, Bul. Şt. Univ. „Politehnica” Timişoara, Ser. Math. Physics, 46 (60), 2 (2001), 1 – 12.

113. T. Noiri and V. Popa, On some weak forms of continuity for multifunctions, Istanbul Univ. J. Math. 60 (2001), 55 – 72.

22000022 114. V. Popa and T. Noiri, On weakly (τ,m) – continuous functions, Rend. Circ. Mat.

Palermo, 2, 51 (2002), 295 – 316. 115. V. Popa and T. Noiri, On upper and lower weakly α – continuous multifunctions,

Novi Sad J. Math. 32, 1 (2002), 7 – 24. 116. V. Popa and T. Noiri, A unified theory of weak continuity for functions, Rend. Circ.

Mat. Palermo, 2, 51 (2002), 439 – 464. 117. T. Noiri and V. Popa, A unified theory of contracontinuity for functions, Anal. Univ.

Sci. Budapest, 44 (2002), 115 – 137. 118. T. Noiri and V. Popa, Strongly θ – β – continuous functions, J. Pure Math. 19 (2002),

31 – 39. 119. T. Noiri and V. Popa, A unified theory of points of discontinuity for multifunctions,

Bull. Math. Soc. Sci. Math. Roumanie, 45 (93) (2002), 97 – 107. 120. V. Popa and T. Noiri, Characterizations of weakly quasicontinuous multifunctions,

Anal. Univ. de Vest, Timişoara, Ser. Mat. Inform. 40, 1 (2002), 93 – 105. 121. V. Popa and T. Noiri, On almost m – continuous functions, Mathematicae Notae, 40

(1999 – 2002), 75 – 94. 22000033 122. T. Noiri and V. Popa, A unified theory of θ – continuity for functions, Rend. Circolo

Mat. Palermo, 2, 52 (2003) 163 – 168. 123. V. Popa and T. Noiri, On weakly m – continuous functions, Mathematica 45(68), 1

(2003), 53 – 68 124. T. Noiri and V. Popa, On m – D – separation axioms, Istanbul Univ. J. of Math. 61 –

62 (2002 – 2003), 15 – 28. 125. V. Popa and T. Noiri, Properties of upper and lower θ – continuous multifunctions,

Bul. Şt. Univ. Politehnică, Timişoara, 48 (62), 2 (2003), 35 – 48. 126. V. Popa and T. Noiri, A unified theory on the points of continuity and discontinuity

for multifunctions, Anal. Univ. de Vest – Timişoara, Ser. Mat. Inform., 41 (2003), 131 – 141.

22000044 127. T. Noiri and V. Popa, Faintly m – continous multifunctions, Chaos, Solitons and

Fractals, 19 (2004), 1147 – 1159. 128. V. Popa and T. Noiri, Some properties of weakly quasicontinuous functions in

bitopological spaces, Mathematica, 46 (69), 1 (2004), 105 – 112. 129. T. Noiri and V. Popa, On weakly preopen functions in bitopological spaces, J. Pure

Math. 21, (2004), 101 – 110. 22000055 130. T. Noiri and V. Popa, A unified theory of strong θ – continuity for functions, Acta

Math. Hungar., 106 (3) (2005), 167 – 186.

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131. T. Noiri and V. Popa, Some properties of upper and lower θ – quasicontinuous multifunctions, Demonstratio Math., 38 (1) (2005), 223 – 234.

132. T. Noiri and V. Popa, Some properties of almost contra – precontinuous functions, Bull. Malaysian Math. Sci. Soc. 28, 2 (2005), 107 – 116.

133. E. Ekici and V. Popa, Some properties of upper and lower clopen continuous multifunctions, Bul. Şt. Univ. “Politehnică”, Timişoara, 50 (64), 1 (2005), 1 – 11.

134. T. Noiri and V. Popa, On m – quasi – irresolute functions, Math. Moravica 9 (2005), 25 – 41.

135. T. Noiri and V. Popa, A unified theory of weakly closed functions, Anal. Şt. Univ. “Al. I. Cuza” Iaşi, S Ia, 51, 2 (2005), 361 – 375.

136. T. Noiri and V. Popa, A note on decomposition of super continuity, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 15 (2005), 105 – 112.

137. T. Noiri and V. Popa, On almost strongly θ – m – continuous functions, Univ. of Istanbul J. Math. Physics and Astronomy, 1 (2004 – 2005), 69 – 92.

138. T. Noiri and V. Popa, A unified theory of θ – continuity for multifunctions, Anal. Univ. de Vest, Timişoara, 43, 1 (2005), 83 – 107.

22000066 139. T. Noiri and V. Popa, On θ – m – continuous functions, Libertas Math. 26 (2006), 1

– 13. 140. T. Noiri and V. Popa, A new view point in the study of irresolute forms in

bitopological spaces, J. of Math. Analysis and Approx. Theory, 1 (2006), 1 – 9. 141. T. Noiri and V. Popa, Some properties of weakly open functions in bitopological

spaces, Novi Sad J. Math. 36 (1) (2006), 47 – 54. 142. V. Popa and T. Noiri, Characterization of C – quasicontinuous multifunctions,

Mathematica Balkanica, New Series, 2006, 3 – 4, 265 – 274. 143. T. Noiri and V. Popa, Between closed sets and g – closed sets, Rend. Circ. Mat.

Paleromo, (2), 55 (2006), 175 – 184. 144. T. Noiri and V. Popa, Slightly m – continuous multifunctions, Bull. Inst. Math. Acad.

Sinica, New Series, 1, 4 (2006), 485 – 505. 145. T. Noiri and V. Popa, A unified theory of weak continuity for multifunctions, Stud.

Cerc. Şt. Ser. Mat. Inform. 16 (2006), 167 – 200. 146. T. Noiri and V. Popa, A unified theory of closed functions, Bull. Math. Soc. Sci.

Math. Roumaine, 49 (97), 4 (2006), 371 – 382. 147. T. Noiri and V. Popa, A unified theory of weakly open functions, Missouri J. Math.

Sci. Article 18, 3 (2006), 17 – 36. 148. T. Noiri and V. Popa, Minimal structures, continuous multifunctions and

bitopological spaces, J. Pure Math. 23 (2006), 37 – 52. 149. T. Noiri and V. Popa, Minimal structures, m – open functions and bitopological

spaces, Creative Math. Inform. 18, 1 (2006), 50 – 56. 22000077 150. T. Noiri and V. Popa, On weakly precontinuous functions in bitopological spaces,

Soochow J. Math. 33, 1 (2007), 87 – 100. 151. T. Noiri and V. Popa, A new view point in the study of continuity forms in

bitopological spaces, Kochi J. Math. 2 (2007), 95 – 106. 152. T. Noiri and V. Popa, Separation axioms in quasi m – bitopological spaces, Fasciculi

Math. 38 (2007), 75 – 85.

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153. T. Noiri and V. Popa, Minimal structures, punctually m – open functions in sense of Kuratowski and bitopological spaces, Mathematical Communications 12 (2007), 247 – 253.

154. M. Caldas, D. Ganster, D. N. Georgiou, S. Jafari and V. Popa, On a generalization of closed sets, Kyungpaak Math. J., 47 (2007), 155 – 164.

155. G. I. Chaes, T. Noiri and V. Popa, Quasi M – continuous functions in bitopological spaces, J. Natural Sci., 16, 1 – 2 (2007), 23 – 33.

156. T. Noiri and V. Popa, Minimal structures, m – open multifunctions and bitopological spaces, J. Pure Math. 24 (2007), 89 – 104.

157. T. Noiri and V. Popa, A general decomposition of continuity, Ann. Univ. Sci. Budapest, 50 (2007), 41 – 50.

158. T. Noiri and V. Popa, A generalization of weakly continuous multifunctions, Ann. Univ. Sci. Budapest, 50 (2007), 59 – 74.

22000088 159. T. Noiri and V. Popa, A unified theory of R – continuity, Acta Math. Hungarica 118

(2008), 61 – 74. 160. T. Noiri and V. Popa, Some forms of C – continuity for multifunctions, European J.

Pure Appl. Math. 1, 1 (2008), 82 – 90. 161. T. Noiri and V. Popa, A unified theory of almost contra – continuity for functions,

Kochi J. Math. 3 (2008), 125 – 138. 162. T. Noiri and V. Popa, On some forms of weakly continuous functions in

bitopological spaces, Demonstratio Math. 41, 3 (2008), 685 – 701. 163. T. Noiri and V. Popa, Minimal structures, weakly irresolute functions and

bitopological spaces, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 18 (2008), 181 – 192. 164. M. Brescan and V. Popa, Some new characterizations of upper/lower almost weakly

continuous multifunctions, Bull. U. P. G. Ploieşti, 60, 1 (2008), 19 – 28. 165. T. Noiri and V. Popa, Characterizations of weakly quasi – continuous multifunctions,

Bul. Şt. Univ. Politehnica, Timişoara, 53 (67) (2008), 12 – 24. 22000099 166. T. Noiri and V. Popa, Minimal structures, m – open multifunctions in the sense of

Kuratowski and bitopological spaces, Fasciculi Math. 41 (2009), 108 – 118. 167. E. Ekici, S. Jafari and V. Popa, On almost contra – continuous multifunctions,

Lobachevski J. Math. 30, 2 (2009), 124 – 131. 168. T. Noiri and V. Popa, Some forms of almost continuity for functions in bitopological

spaces, Anal. Univ. Oradea, 16 (2009), 209 – 224. 169. T. Noiri and V. Popa, A unified theory of upper and lower almost weakly continuous

multifunctions, Math. Balkanica, 23, 1 – 2 (2009), 51 – 72. 170. T. Noiri and V. Popa, On weak s – m – continuity for multifunctions, Libertas Math.,

29 (2009), 1 – 15. 171. T. Noiri and V. Popa, A generalization of some forms of g – irresolute functions,

European J. Pure Appl. Math. 2, 4 (2009), 487 – 493. 172. V. Popa and T. Noiri, On the points of weak m – continuity and weak m –

discontinuity, Bull. U.P.G., Ploieşti, Ser. Mat. Inform. Fiz. 61, 1 (2009), 43 – 50. 173. T. Noiri and V. Popa, Minimal structures, punctually m – open functions and

bitopological spaces, Sci. Stud. Research Ser. Math. Inform., Vasile Alecsandri Univ. Bacău, 19 (2009), 145 – 154.

174. T. Noiri and V. Popa, A new viewpoint in the study of g – closed functions, J. Pure Math. 26 (2009), 115 – 131.

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22001100 175. E. Ekici, S. Jafari and V. Popa, On a contra precontinuous and almost contra

precontinuous multifunctions, J. Adv. Res. Pure Math. 2, 1 (2010), 11 – 25. 176. T. Noiri and V. Popa, The unified theory of certain types of generalizations of

Lindeöf spaces, Demonstratio Math. 43, 1 (2010), 203 – 212. 177. T. Noiri and V. Popa, A new viewpoint in the study of g – continuity forms in

topological spaces, Kochi J. Math. 15 (2010), 53 – 66. 178. T. Noiri and V. Popa, Between * – closed sets and * – g – closed sets in ideal

topological spaces, Rend. Circolo Mat. Palermo, 2, 59 (2010), 251 – 260. 179. T. Noiri and V. Popa, On decomposition of continuity in topological spaces, Acta

Math. Hungar. 128 (1-2) (2010), 175 – 189. 180. T. Noiri and V. Popa, A unified theory of almost continuity for multifunctions, Sci.

Stud. Research, Vasile Alecsandri Univ. Bacău, Ser. Math. Inform. 20, 1 (2010), 185 – 213.

181. T. Noiri and V. Popa, A generalization of m – continuity, Fasciculi Math. 45 (2010), 71 – 86.

182. T. Noiri and V. Popa, On some new forms of weak continuity for multifunctions in bitopological spaces, The Aligarh Bull. of Math. 9, 1 (2010), 9 – 22.

183. T. Noiri and V. Popa, A decomposition of m – continuity, Bull. U. P. G. – Ploieşti, Ser. Mat. Inform. Fiz. 62, 2 (2010), 46 – 53.

184. T. Noiri and V. Popa, On almost neary M – continuous multifunctions, Bul. Şt. Univ. Politehnica, Timişoara, Ser. Mat. Mec. Teor. Fiz. 55 (69), 2 (2010), 1 – 15.

185. T. Noiri and V. Popa, Several other forms of separation axioms in bitopological spaces, J. Pure Math. 27 (2010), 25 – 42.

186. T. Noiri and V. Popa, On some forms of (1,2)* - continuity in bitopological spaces, J. Pure Math. 27 (2010), 67 – 93.

187. S. Jafari, T. Noiri, V. Popa and N. Rajesh, On upper and lower weakly δ – β – s – continuous multifunctions, J. Adv. Res. Appl. Math. 2 (2010), 52 – 60.

22001111 188. T. Noiri and V. Popa, A new viewpoint on the study of some contra g – continuous

forms of continuity, Kochi J. Math. 6 (2011), 61 – 76. 189. T. Noiri and V. Popa, On almost m – continuous multifunctions, Anal. Univ. Oradea,

Fasc. Matem. 18 (2011), 115 – 131. 190. S. Jafari, T. Noiri, V. Popa and N. Rajesh, On upper and lower faintly δ – β –

continuous multifunctions, Fasciculi Math. 46 (2011), 77 – 86. 191. T. Noiri and V. Popa, A unified theory of weak contra – continuity, Acta Math.

Hungar. 132, 1 – 2 (2011), 63 – 77. 192. T. Noiri and V. Popa, A generalization of blurly (1,2) – β – irresolute functions,

Libertas Math. 32 (2011), 1 – 13. 193. T. Noiri and V. Popa, Fusther properties of quasi H – continuous functions, Fasciculi

Math. 47 (2011), 29 – 46. 194. T. Noiri and V. Popa, Near m – continuity for multifunctions in bitopological spaces,

Anal. Univ. Sci. Budapest, 54 (2011), 63 – 78. 195. T. Noiri and V. Popa, A general decomposition theorem for closed functions, Sci.

Stud. Research, Ser. Mat. Inform., Vasile Alecsandri Univ. Bacău, 21 (2011), 57 – 66.

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22001122 196. T. Noiri and V. Popa, Nearly g – continuous multifunctions, Kochi J. Math. 7 (2012),

51 – 71. 197. M. Caldas, S. Jafari, V. Popa, N. Rajesh, Separation axioms in ideal bitopological

spaces, Selection papers of the 2010 Intern. Conf. on Topology and Applications, Techn., Educ. Institut of Mesalonghi, Nafpakatos, (2012).

198. T. Noiri and V. Popa, On iterate minimal structures and iterate m – continuous functions, Annal. Univ. Sci. Budapest, 55 (2012), 67 – 79.

199. T. Noiri and V. Popa, Another general decomposition theorem of closed function, Sci. Stud. Research. Ser. Mat. Inform., Vasile Alecsandri Univ. Bacău, 22, 2 (2012), 91 – 98.

22001133 200. T. Noiri and V. Popa, Weakly quasi M – continuous functions in bitopological

spaces, Anal. Univ. Oradea, Fasc. Math. 20 (1) (2013), 35 – 46. 201. T. Noiri and V. Popa, A unified theory of weakly g – closed sets and weakly g –

continuous functions, Sarajevo J. Math. 9 (21) (2013), 129 – 142.

Fixed point theory

11997744 1. V. Popa, G. Puiu, Asupa punctelor fixe comune pentru mai multe aplicaţii (On

common fixed points for several functions), Stud. Cerc. Mat., 26, 3 (1974), 439 – 444.

11997777

2. V. Popa, G. Puiu, C. Stan, Sur le point fixe commun des plusieurs applications dans des espaces Hausdorff, Bull. Math. Soc. Sci. Roumanie, 21 (69), 3 – 4 (1977), 405 – 409.

3. V. Popa, G. Puiu, C. Stan, Sur un problem de continuité pour le point fixe commun de plusieurs applications, Acta Acad. Pedag. Nyiregyhaziensis, 7 (1977), 27 – 31.

11997799

4. V. Popa, A common fixed point theorem for a sequence of multifunctions, Studia Univ. Babeş-Bolyai, Mathematica, 24, 2 (1979), 35 – 41.

5. V. Popa, A common fixed point theorem for multifunctions, Bul. Sem. Tehnic “Traian Vuia”, Timişoara, Ser. Mat. Fiz., 24 (38), 2 (1979), 7 – 8.

11998800

6. V. Popa, G. Puiu, C. Stan, Puncte fixe comune pentru mai multe aplicaţii (Common fixed points for seeral functions), Studii Cerc. (Matem.), (1980), 129 – 132.

7. V. Popa, G. Puiu, C. Stan, Quelque generalizations pour le théoreme de Edelstein, Studii Cerc. (Matem.), (1980), 133 – 138.

8. V. Popa, G. Puiu, C. Stan, Quelque remarques sur les points fixed communes a plusieurs applications, Studii Cerc. (Matem.), (1980), 139 – 146.

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11998822 9. V. Popa, Fixed point theorems for multifunctions, Studia Univ. Babeş-Bolyai,

Mathematica, 27 (1982), 21 – 27. 10. V. Popa, Puncte fixe comune pentru un şir de multifuncţii (Common fixed points

for a sequence of multifunctions), Stud. Cerc. Mat., 34, 4 (1982), 370 – 373. 11998833

11. V. Popa, Results on common fixed points for multifunctions, Studii şi Comunicări Şt. I. I. S. Bacău, (1983), 101 – 104.

12. V. Popa, Some unique fixed point theorems in Hausdorff spaces, Indian J. Pure Appl. Math., 14 (6) (1983), 713 – 717.

13. V. Popa, Theorems on multifunctions satisfying a rational inequality, Commentationes Mathematicae Universitatis Carolinae, 24, 4 (1983), 673 – 680.

11998844

14. V. Popa, Results on common fixed points, Mathematica (Cluj), 26, (49), 1 (1984), 75 – 79.

15. V. Popa, Fixed point theorems for sequences of multifunctions, Bull. Math. Soc. Sci. Math. Roumanie, 28 (76), 3 (1984), 251 – 257.

11998855

16. V. Popa, Common fixed points for multifunctions satisfying a rational inequality, Kobe J. Math., 1, 2 (1985), 23 – 28.

17. V. Popa, Common fixed points of a sequences of multifunctions, Babeş-Bolyai Univ. Research “Seminar of Fixed Point Theory”, Preprint, 3 (1985), 59 – 68.

11998866

18. V. Popa, Sur les theorems de point fixe en espaces Hausdorff, Studii Cerc. Bacău, (1986), 176 – 179.

19. V. Popa, Some fixed point theorems of expansion mappings, Demonstratio Math., 19 (3) (1986), 699 – 702.

20. V. Popa, Set valued mappings of complete metric spaces, Comptes Rendues Acad. Bulgar. of Sciences, 39, 1 (1986), 5 – 8.

11998877

21. V. Popa, Common fixed points of commuting mappings, Revue d’Analyse Numeriqué et de Théorie de l’Approximations, 29 (92), 1 (1987), 67 – 71.

22. V. Popa, Fixed point theorems for multifunctions satisfying a rational inequality, J. Math. Kuwait (Sci.), 14, 2 (1987), 183 – 188 .

23. V. Popa, Commuting mappings and fixed points, Stud. Cerc. Şt. Bacău, (1987), 84 – 86.

24. V. Popa, Fixed point theorems for expansion mappings, Seminar of Fixed Point Theory, Babeş-Bolyai Univ., Preprint, 3 (1987), 25 – 30.

25. V. Popa, Some theorems on common fixed points, J. M. A. C. T., 20 (1987), 101 – 106.

26. V. Popa, Theorems on commuting mappings satisfying a rational inequality, Studia Univ. Babeş-Bolyai, Ser. Math., 32, 2 (1987), 58 – 61.

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11998888 27. V. Popa, Fixed point theorems for commuting mappings, Demonstratio Math., 21,

1 (1988), 143 – 151. 28. V. Popa, A coincidence theorem for multifunctions, Review Research, Fac. Sci.

Math. Ser., Novi-Sad, 18, 1 (1988), 149 – 156. 11998899

29. V. Popa, Theorems on mappings into Hausdorff space, Demonstratio Math., 22, 3 (1989), 599 – 605.

30. V. Popa, Common fixed points of weakly commuting mappings, Journal of M. A. C. T., 22 (1989), 49 – 54.

11999900

31. V. Popa, A common fixed point theorem of weakly commuting mappings, Publications de l’Institut Mathematique, 47 (61) (1990), 132 – 136.

32. V. Popa, Theorems of unique fixed point for expansion mappings, Demonstratio Math., 1 (1990), 213 – 218.

11999911

33. V. Popa, Common fixed points of compatible mappings, Studii şi Cercetări Şt. Ser. Mat. Univ. Bacău, 1 (1991), 86 – 88.

34. V. Popa, Common fixed points of two weakly commuting mappings, Mathematica, 33 (56), 1 – 2 (1991), 77 – 80.

35. V. Popa, Fixed points on two complete metric spaces, Zb. Rad. Prisad Mat. Fac. Ser. Mat., 21, 1 (1991), 83 – 93.

11999922

36. V. Popa, Common fixed points of two compatible mappings, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 2 (1992), 109 – 114.

37. V. Popa, A common fixed point theorem for mappings on a compact metric space, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 2 (1992), 119 – 122.

38. V. Popa, Theorems of fixed points for pairs of expansion mappings, Studia Univ. Babeş - Bolyai, 35 (1992), 83 – 87.

11999933

39. V. Popa, Common fixed points of compatible mappings, Demonstratio Math., 26, 3 – 4 (1993), 803 – 809.

40. V. Popa, A general common fixed point theorem for compatible mappings, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 3 (1993), 107 – 114.

41. V. Popa and H. K. Pathak, On common fixed of weak compatible mappings in metric spaces, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 3 (1993), 89 – 100.

11999944

42. V. Popa and H. K. Pathak, A common fixed point theorem without continuity for weak compatible maps under Altman’s condition and its applications, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 4 (1994), 41 – 46.

43. V. Popa and H. K. Pathak, Common fixed points of weakly compatible mappings, Studia Univ. Babeş - Bolyai, 39 (1994), 65 – 78.

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11999955 44. V. Popa, H. K. Pathak and V. V. S. N. Lakshimi, A fixed point theorem for m –

weak ** commuting mappings, Demonstratio Math., 28 (1995), 697 – 702. 45. V. Popa and H. K. Pathak, Common fixed points of compatible mappings of type

(A), Studia Univ. Babeş - Bolyai, 40 (1995), 49 – 57. 11999966

46. V. Popa, Pointwise contractive mappings on semi – Hausdorff spaces, Simposium Septimun Teraspolense Generalis Topologiae et Suae Applicationum, Chişinău, (1996), 194 – 198.

47. H. K. Pathak and V. Popa, Common fixed point theorems for compatible mappings of type (A) satisfying a phi – rational inequality, Revue d’Analyse Numeriqué et de Théorie de l’Approximations, 25, 1 – 2 (1996), 185 – 193.

48. V. Popa, H. K. Pathak, Common fixed points for δ – compatible mappings, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 6 (1996), 163 – 169.

11999977

49. V. Popa and H. K. Pathak, Compatible mappings of type (P) and common fixed points, The fourth international colloques “The risk in contemporany economy”, Proc. Mathematical Section, Univ. Galaţi (1997), 101 – 105.

50. V. Popa, On unique common fixed points for compatible mappings of type (A), Demonstratio Math., 30, 4 (1997), 931 – 936.

51. V. Popa, H. K. Pathak, Common fixed point theorem for compatible mappings and compatible of type (A), Mat. Vesnik, 49 (1997), 109 – 114.

52. V. Popa, Fixed point theorems for implicit contractive mappings, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 7 (1997), 127 – 134.

53. V. Popa, On fixed points for surjective mappings in semi – Hausdorff space, Bul. Şt. Univ. Baia Mare, Ser. Mat. Inform., 13 (1997), 139 – 146.

11999988

54. V. Popa, Some fixed point theorems in Hilbert spaces, Mathematical and Computational Applications, 3, 1 (1998), 11 – 16.

55. V. Popa, On some coincidence theorems for hybrid contractions, Bul. Univ. “Petrol - Gaze” – Ploieşti, 16 (1995 – 1998), 47 – 50.

56. V. Popa, Fixed point theorems for sequences of multifunctions satisfying an implicit relation, Anal. Univ. “Dunărea de Jos”, Galaţi, Mat. Fiz. Mec. Teor. Fasc. II, Suppl., Vol. I Matem. 16 (21) (1998), 207 – 212.

57. V. Popa, A general coincidence theorem for compatible multivalued mappings, Hacettepe Bull. Not. and Sci. and Enginering, Ser. B (1998), 13 – 18.

58. V. Popa, D. Turkoglu, Some fixed point theorems for hybrid contractions satisfying an implicit relation, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 8 (1998), 75 – 86.

59. V. Popa and M. Telci, Some fixed point theorems for implicit expansive mappings, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 8 (1998), 87 – 96.

60. V. Popa, H. K. Pathak, Fixed point theorems of type (A), Anal. Univ. Timişoara, Ser. Mat. Inform., Fasc. I, 36, 1 (1998), 101 – 108.

11999999

61. V. Popa, Some fixed point theorems for compatible mappings satisfying an implicit relation, Demonstratio Math., 1 (1999), 157 – 163.

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62. V. Popa, A fixed point theorem for mappings in d – complete topological space, Math. Moravica, 3 (1999), 43 – 48.

63. V. Popa, A general fixed point theorem for weakly commuting multivalued mappings, Anal. Univ. “Dunărea de Jos”, Galaţi, Fasc. II, 17 (22) (1999).

64. V. Popa, Coincidence points for hybrid contractions satisfying an implicit relation, Bul. Şt. Ser. Mat. Univ. Baia Mare, 5, 1 – 2 (1999), 55 – 60.

65. V. Popa, Common fixed point theorems for compatible mappings of type (A) satisfying an implicit relation, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 9 (1999), 165 – 172.

22000000

66. V. Popa, A general coincidence theorem for compatible mappings satisfying an implicit relation, Demonstratio Math., 33, 1(2000), 159 – 164.

67. V. Popa, On some fixed point theorems for compatible mappings, Math. Balkanica, Fasc. 1 – 2, 14(2000), 91 – 99.

68. V. Popa, Fixed point theorems in convex metric space for mappings satisfying an implicit relation, Bul. Şt. Univ. Politehn. – Timişoara, 45 (99), 1 (2000), 1 – 10.

69. V. Popa, Two general fixed point theorems for mappings on two metric spaces, Anal. Univ. . “Dunărea de Jos” – Galaţi, Fasc. II, Mat. Fiz., Mec. Teor. Suppl. vol. 18, 18 (23) (2000), 19 – 24.

70. V. Popa, Two general fixed point theorems on three complete metric spaces, Novi Sad J. Math. 30, 1 (2000), 43 – 50.

71. V. Popa, Two general fixed point theorems for multifunctions satisfying implicit relations, Bul. Inst. Politehn. Iaşi, Sec. I-a, 46 (50), 1 – 2 (2000), 41 – 46.

72. V. Popa, Some fixed point theorems for multivalued mappings on reflexive Banach spaces, Math. Moravica, 4 (2000), 93 – 98.

22000011

73. V. Popa, A general fixed point theorem for generalized metric spaces, Bul. Univ. “Petrol – Gaze”, Ploieşti, Ser. Mat. Inf. Fiz., 1(2001), 23 – 26.

74. V. Popa, A general fixed point theorem for weakly compatible mappings in compact metric spaces, Turkish J. Math. 25, 4 (2001), 465 – 474.

75. V. Popa, Some fixed point theorems for weakly compatible mappings, Radovi Mat., 10, 2 (2001), 245 – 252.

76. V. Popa, Coincidence points of compatible mappings satisfying an implicit relation, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 11 (2001), 159 – 163.

77. V. Popa, A general fixed point theorem for compatible mappings of type (P), Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 11 (2001), 153 – 157.

22000022

78. V. Popa, Coincidence and fixed points for non continuous hybrid contractions, Nonlinear Analysis Forum, 7 (2) (2002), 153 – 158.

79. V. Popa, Fixed point theorems for mappings in d – complete topological spaces, Math. Moravica, 6 (2002), 87 – 92.

80. V. Popa, A general fixed point theorem for mappings in pseudocomplex Tychonoff spaces, Mat. Moravica, 6 (2002), 93 – 96.

81. V. Popa, Fixed points for non – surjective expansion mappings satisfying an implicit relation, Bul. Şt. Univ. Baia Mare, Ser. Mat. Inform., 18, 1 (2002), 105 – 108.

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82. V. Popa, A general fixed point theorem for expansion mappings in pseudo – compact spaces, Bull. Inst. Politeh. Iaşi, 48 (52), 3 – 4 (2002), 7 – 10.

22000033

83. V. Popa, Some fixed point theorems in Hilbert spaces for mappings satisfying an implicit relation, Bull. U.P.G. – Ploieşti, Ser. Mat. Inform. Fiz., 55, 1 (2003), 1 – 4.

84. V. Popa, Some general fixed point theorems in Hausdorff spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 12 (2002), 179 – 188.

85. V. Popa and C. Berceanu, A general fixed point theorem for pair of orbitally continuous mappings, Anal. Univ. “Dunărea de Jos”, Galaţi, Ser. Mat. Fiz. Mec. Teor., Fasc. II, 21 (26) (2003), 57 – 65.

86. V. Popa, On some fixed point theorems satisfying a new type of implicit relation, Math. Moravica, 7 (2003), 61 – 66.

87. V. Popa and C. Berceanu, On common coincidence points for pair of mappings satisfying an implicit relation, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 13 (2003), 125 – 132.

88. V. Popa, On some fixed point theorems for multivalued mappings, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 13 (2003), 133 – 137.

22000044

89. V. Popa, A general common fixed point theorem of Meir and Keeler type for noncontinuous weak compatible mappings, Filomat, 18 (2004), 33 – 40.

90. V. Popa, A general fixed point theorem for multifunctions satisfying a new type of implicit relation, Anal. Univ. “Dunărea de Jos”, Galaţi, Ser. Mat. Fiz. Mec. Teor., Fasc. II, 2, 22 (27) (2004), 23 – 26.

91. V. Popa, A general fixed point theorem for weakly δ – compatible mappings in compact metric spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 14 (2004), 125 – 134.

92. V. Popa, Stationary points for multifunctions on two complete metric spaces, Math. Moravica, 8, 1 (2004), 33 – 38.

22000055

93. V. Popa, A generalization of Meir – Keeler type common fixed point theorem for four noncontinuous mappings, Sarajevo J. Math., 1 (13) (2005), 135 – 142.

94. V. Popa, A general common fixed point theorem of Meir – Keeler type for weakly compatible mappings, Carpathian J. Math., 21, 1 – 2 (2005), 109 – 114.

95. V. Popa, A general fixed point theorem for four weakly compatible mappings satisfying an implicit relation, Filomat, 19 (2005), 45 – 54.

96. V. Popa and A.-M. Patriciu, Two fixed point theorems for noncontinuous weak compatible and weak** commuting mappings, Anal. Univ. “Dunărea de Jos”, Ser. Mat. Fiz. Mec. Teor., Fasc. II , 23 (28) (2005), 81 – 85.

97. V. Popa, A general fixed point theorem for two pairs of mappings on two metric spaces, Novi Sad J. Math., 35, 2 (2005), 79 – 83.

98. V. Popa, Fixed point theorems for mappings satisfying a new type of implicit relation, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 15 (2005), 123 – 128.

99. V. Popa, A general fixed point theorem under strict implicit contractive condition, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 15 (2005), 129 – 133.

100. V. Popa, A fixed point theorem for four weakly compatible mappings in compact metric spaces, U.P.B. Sci. Bull. Ser. A, 67, 3 (2005), 35 – 40.

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22000066 101. V. Popa and M. Telci, Fixed point theorems for mappings satisfying an implicit

relation on two metric spaces, Math. Balkanica, 20, 2 (2006), 143 – 152. 102. V. Popa, A general common fixed point theorem for noncontinuous weakly

compatible mappings, Bull. Inst. Politehnic Iaşi Ser. Mat. Mec. Teor. Fiz., 52 (56), 1 – 2 (2006), 15 – 23.

103. V. Popa and A.-M. Patriciu, A general fixed point theorem for multifunctions in d – complete symmetrizable spaces, Anal. Univ. “Dunărea de Jos”, Ser. Mat. Fiz. Mec. Teor., Fasc. II , 24 (29) (2006), 37 – 40.

104. V. Popa, Well posedness of fixed point problem in orbitally complete metric spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, Suppl. 16 (2006), 209 – 214.

22000077

105. V. Popa, On Frigon – Granas type multifunctions satisfying an implicit relation, Demonstratio Math., 40, 4 (2007), 907 – 912.

106. V. Popa, A general selection theorem for multivalued functions satisfying an implicit relation, Fixed Point Theory, 8, 2 (2007), 297 – 301.

107. V. Popa, A general fixed point theorem for converse commuting multivalued mappings in symmetric spaces, Filomat, 21, 2 (2007), 261 – 265.

108. V. Popa and M. Mocanu, A new viewpoint in the study of fixed points for mappings satisfying a contractive condition of integral type, Bul. Inst. Politehnic Iaşi Ser. Mat. Mec. Teor. Fiz., 53 (57), 5 (2007), 269 – 282.

109. V. Popa, Two coincidence and fixed point theorems for hybrid strict contraction, Math. Moravica, 11 (2007), 79 – 83.

110. V. Popa, A general fixed point theorem for expansive mappings under strict implicit relations, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 17 (2007), 197 – 200.

111. V. Popa, Coincidence points for multivalued mappings in compact metric spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 17 (2007), 201 – 206.

22000088

112. V. Popa, A common fixed point theorem for two multifunctions defined on closed ball, Fasciculi Math., 39 (2008), 63 – 69.

113. V. Popa and M. Mocanu, Some fixed point theorems for mappings satisfying an implicit relation in symmetric spaces, Libertas Mathematica, 38 (2008), 1 – 13.

114. A. Aliouche and V. Popa, Coincidence and common fixed point theorems for hybrid mappings, Math. Moravica, 12, 1 (2008), 1 – 13.

115. V. Popa, Generalized fixed point theorems for occasionally weakly compatible mappings, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 18 (2008), 181 – 192.

116. V. Popa, A general fixed point theorem for mappings in ultra metric spaces, Stud. Cerc. Şt. Ser. Mat., Univ. Bacău, 18 (2008), 249 – 254.

117. V. Popa, Well posedness of fixed point problem in compact metric spaces, Bul. U.P.G. – Ploieşti, Ser. Mat. Inform. Fiz., 60, 1 (2008), 1 – 4.

22000099

118. A. Aliouche and V. Popa, Coincidence and common fixed point theorems via R – weak commutativity of type AT, Fasciculi Math., 41 (2009), 5 – 16.

119. V. Popa, Symmetric spaces and fixed point theorems for occasionally weakly compatible mappings satisfying contractive conditions of integral type, Bul. Inst. Politehn. Iaşi Ser. Mat. Fiz. Mec. Teor., 55 (59), 3 (2009), 11 – 21.

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120. V. Popa and M. Mocanu, Altering distance and common fixed points under strict implicit relations, Hacettepe J. Math. and Statistics, 38 (3) (2009), 329 – 337.

121. A. Aliouche and V. Popa, General common fixed point theorems for occasionally weakly compatible hybrid mappings and applications, Novi Sad J. Math., 39, 1 (2009), 89 – 109.

122. V. Popa, Stationary points for multifunctions on three metric spaces, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 19, 1 (2009), 167 – 174.

123. V. Popa, Some general fixed point theorems for occasionally weakly compatible D - mappings, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 19, 2 (2009), 403 – 414.

22001100

124. V. Popa, M. Imdad and J. Ali, Using implicit relations to prove unified fixed point theorems in metric and 2 – metric spaces, Bull. Malaysian Math. Sci. Soc., 2, 33, 1 (2010), 105 – 120.

125. V. Popa, Weakly Picard pairs of multifunctions, Cubo A Math. J., 12, 1 (2010), 59 – 69.

126. V. Popa, M. Imdad and J. Ali, Fixed point theorems for a class of mappings governed by strict contractive implicit functions, Southeast Assian Bull. Math., 34 (2010), 941 – 952.

127. M. Akkouchi and V. Popa, Well posedness of common fixed point problem for three mappings under strict contractive conditions, Bul. U.P.G. – Ploieşti, Ser. Mat. Inf. Fiz., 61, 2 (2009), 1 – 10.

128. V. Popa, Weakly Picard pairs of multifunctions satisfying implicit relations, Proc. 2nd Int. Conf. Sci. Techn. U.P.G. – Ploieşti, 2010, 21 – 26.

129. M. Akkouchi and V. Popa, Well posedness of fixed point problem using G - functions, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 20, 1 (2010), 5 – 12.

130. M. Akkouchi and V. Popa, Well posedness of fixed point problem for mappings satisfying an implicit relation, Demonstratio Math., 43, 4 (2010), 923 – 929.

131. V. Popa, A Caristi selection theorem for a multifunction satisfying an implicit contractive condition of Latif-Beg type, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 20, 2 (2010), 55 – 60.

132. A. Aliouche and V. Popa, Common fixed point theorems of Meir-Keeler type for occasionally weakly compatible mappings, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 20, 2 (2010), 5 – 20.

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133. M. Imdad, J. Ali and V. Popa, Impact of occasionally weakly compatible property on common theorems for expansive mappings, Filomat, 25, 2 (2011), 79 – 89.

134. M. Akkouchi and V. Popa, Well posedness of fixed point problem for hybrid pair of mappings, Fasciculi Math., 46 (2011), 5 – 16

135. V. Popa, Altering distance and strict fixed points for multifunctions satisfying implicit relations, Bul. Inst. Politehn. Iaşi Ser. Mat. Fiz. Mec. Teor., 57 (61), 2 (2011), 1 – 10.

136. A. Aliouche and V. Popa, Common fixed points for occasionally weakly compatible mappings in compact metric spaces, Acta Univ. Apulensis, 28 (2011), 203 – 214.

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137. V. Popa, A general fixed point theorem for general mappings in G – metric spaces, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 21, 1 (2011), 205 – 214.

138. M. Akkouchi and V. Popa, Well posedness of fixed point problem for a multifunction satisfying an implicit relation, Math. Moravica, 15, 2 (2011), 1 – 9.

22001122

139. V. Popa, M. Imdad and J. Ali, On strict common fixed points of hybrid mappings in 2 – metric spaces, J. King Sand Univ. Sci., 24 (2012), 289 – 294.

140. M. Akkouchi and V. Popa, Altering distance and fixed point results for tangential mappings, Bull. Belgian Math. Soc. Simon Stevin, 19 (2012), 155 – 164.

141. V. Popa and A.-M. Patriciu, A general fixed point theorem of weakly compatible mappings in G – metric spaces, J. of Nonlinear Sciences and Appl., 3 (2012), 151 – 160.

142. V. Popa and A.-M. Patriciu, A general fixed point theorem for mappings satisfying an Φ - implicit relation in complete G - metric spaces, Gazi Univ. J. Sci., 25, 2 (2012), 403 – 408.

143. V. Popa and A.-M. Patriciu, A common fixed point theorem for occasionally weakly compatible mappings satisfying an implicit relation without decreasing assumption and applications, Bull. Inst. Politehnic Iaşi, Ser. Math. Theoretical Mec. Physics, 57 (62), 3 (2012), 1 – 10.

144. V. Popa, A general fixed point theorem for occasionally weakly compatible maps, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 22, 1 (2012), 77 – 92.

145. V. Popa and A.-M. Patriciu, (E.A) property and altering distance in metric spaces, Sci. Stud. Research, Ser. Math. Inform., Vasile Alecsandri University of Bacău, 22, 1 (2012), 93 – 102.

146. V. Popa and A.-M. Patriciu, Fixed point theorems by altering distances for occasionally weakly compatible hybrid D-mappings and applications, Acta Univ. Apulensis, 31 (2012), 223 – 239.

147. V. Popa and A.-M. Patriciu, Altering distance, fixed points for occasionally weakly hybrid mappings, Fasciculi Math., 49 (2012), 101 – 112.

148. V. Popa and A.-M. Patriciu, Two general fixed point theorems for pairs of weakly compatible mappings in G - metric spaces, Novi Sad J. Math., 42, 2 (2012), 49 – 60.

149. V. Popa and A.-M. Patriciu, A general fixed point theorem for pairs of mappings satisfying implicit relations in two G - metric spaces, Anal. Univ. “Dunărea de Jos”, Galaţi, Ser. Mat. Fiz. Mec. Teor., Fasc. II, 35 (2012), 22 – 28.

150. V. Popa and A.-M. Patriciu, A general fixed point theorem for occasionally weakly compatible hybrid pairs in quasi - metric spaces and applications, Sci. Stud. Res. Ser. Math. Inform., Vasile Alecsandri Univ. Bacău, 22, 2 (2012), 99 – 112.

22001133

151. V. Popa and A.-M. Patriciu, Two common fixed point theorems for three mappings satisfying a Φ – implicit relation in G - metric spaces, Vietnam J. Math., 41, 2 (2013), 233 – 244, DOI 10.1007/s 10013 – 013 – 0020 – 8.

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Didactica Matematicii (Didactics of Mathematics)

11996600

1. V. Popa, Modele pentru predarea geometriei şi trigonometriei în şcoala medie (Models for teaching geometry and trigonometry in middle school), Gazeta Matematică Ser. A, nr. 9 (1960).

11996644

2. V. Popa, O metodă de a demonstra unele teoreme din capitolul “Divizibilitatea numerelor şi polinoamelor” (One method to prove some theorems from the chapter “Divisibility of numbers and polynomials”), Gazeta Matematică Ser. A, nr. 9 (1964).

11996666

3. V. Popa, V. Ţifui, Asupra predării noţiunii de funcţie în şcoala generală de 8 ani (On teaching the notion of function in gymnasium), Gazeta Matematică Ser. A, nr. 3 (1966).

4. V. Popa, Asupra predării unor capitole de geometrie în spaţiu (On teaching some chapters from spatial geometry), Gazeta Matematică Ser. A, nr. 6 (1966).

5. V. Popa, Unele exemple de grupuri (Some group examples), Gazeta Matematică Ser. B, nr. 7 (1966).

11996677

6. V. Popa, Asupra predării definiţiilor ecuaţiilor şi inecuaţiilor (On teaching the definitions of ecuations and inequations), Gazeta Matematică nr. 1 (1967).

7. V. Popa, Predarea unitară a unor proprietăţi ale funcţiilor trigonometrice (Unitary teaching of some properties of trigonometric functions), Gazeta Matematică nr. 8 (1967).

11996699

8. V. Popa, M. Popa, Unele aspecte ale predării teoriei matricelor (Some aspects of teaching matrix theory), Gazeta Matematică nr. 2 (1969).

9. V. Popa, Asupra predării ecuaţiilor în şcoala generală (On teaching equations in gymnasium), Gazeta Matematică nr. 12 (1969).

11997700

10. V. Popa, Predarea teoriei matricelor în liceele economice (Teaching matrix theory in economic highschools), Învăţământul profesional şi tehnic nr. 11 (1970).

11. V. Popa, V. Blănuţă, Unele propuneri privind predarea calculului vectorial în clasa a XI-a (Some proposals regarding teaching vectorial calculul in 11 grade), Stud. Cerc. Şt. (Şt. Naturii), Bacău, 1970, 75 – 78.

12. V. Popa, O generalizare a noţiunii de progresie (A generalization of the notion of progresion), Stud. Cerc. Şt. (Şt. Naturii), Bacău (1970), 79 – 84.

11997722

13. V. Popa, Asupra predării ecuaţiilor şi inecuaţiilor în şcoala generală (On teaching equations and inequations in gymnasium), Stud. Cerc. Şt. (Şt. Sociale), Bacău (1972), 113 – 116.

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14. V. Popa, Unele observaţii privind predarea noţiunii de funcţie în şcoala generală (Some remarks on teaching the notion of function in gymnasium), Stud. Cerc. Şt. (Şt. Sociale), Bacău (1972), 117 – 123.

11997733

15. V. Popa, Asupra predării noţiunii de funcţie continuă (On teaching the notion of continuous function), Gazeta Matematică Ser. A, nr. 9 (1973).

16. V. Popa, Relaţiile clasei de elevi (Relations of the classroom), Revista de Pedagogie, nr. 4 (1973), 121 – 133

17. V. Popa, F. Bădescu, Unele aspecte ale predării matematicii la clasele speciale cu profil de matematică (Some aspects of teaching mathematics at special math classrooms), Stud. Cerc. Şt. (Mat. Fizică), Bacău (1973), 41 – 47.

18. V. Popa, Un model pentru predarea funcţiilor trigonometrice în şcoala generală (One model to teach trigonometric functions in gymnasium), Gazeta Matematică nr. 11 (1973).

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19. V. Popa, Prezentarea unitară a unor teoreme de geometrie în spaţiu (The unitary presentation of some theorems of spatial geometry), Matematica în liceu, partea a II-a, Bucureşti (1976), 152 – 154.

11997799

20. V. Popa, Model polivalent pentru predarea noţiunii de funcţii reală (Polivalent model for teaching the notion of real function), Matematica în învăţământul gimnazial şi liceal, Vol. 2, 72 – 75 (Baia Mare, 1979) (Biblioteca S.S.M.).

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21. V. Popa, M. Popa, Unele aspecte ale prezentării unitare a matematicii în liceu (Some aspects of unitary teaching of Mathematics in highschool), Studii şi Cercetări, Bacău (1986), 185 – 187.

11999955

22. V. Popa, M. Popa, Unele aspecte ale predării teoriei matricelor în liceu (Some aspects of teaching matrix theory in highschool), Publicaţiile Seminarului Pedagogic, Universitatea din Bacău, 1995.

Teoria numerelor (Number Theory)

11997700 1. V. Popa, Asupra unei generalizări a teoremei lui Clement (On a generalization of

Clement Theorem), Stud. Cerc. Matem. 22, 3 (1970), 523 – 526. 11997711

2. V. Popa, Asupra mai multor numere simultan prime (On several simultaneously prime numbers), Stud. Cerc. Matem. 23, 7 (1971), 145 – 149.

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11997722 3. V. Popa, Asupra unor generalizări a teoremei lui Clement (On some

generalizations of Clement Theorem), Stud. Cerc. Matem. 24, 9 (1972), 1435 – 1440.

11998822

4. V. Popa, Asupra unor criterii ca un număr natural să fie prim (Criteria as a natural number to be prime), Gazeta Matematică, Ser. B, 1 (1982), 6 – 8.

Alte publicaţii (Other publications)

11998888 1. V. Popa, Gazeta micilor matematicieni din Grinţies (Gazetta of little

mathematiciens from Grinţies), Ateneu (Bacău), nr. 4 (1988). 11998899

2. V. Popa, Gazeta de matematică (Gazette of Mathematics), Ateneu (Bacău), nr. 4 (1989).

11999911

3. V. Popa, V. Blănuţă, I. C. Cioban, L. Şaradici, Asupra noţiunii de “sistem de servicii”, Stud. Cerc. Şt. Ser. Mat. Univ. Bacău, 1 (1991), 92 – 95.

Cărţi (Books)

22000022 1. V. Popa, M. Mocanu, G. Spătaru Burcă, Matematici speciale. Examene (Special

Mathematics. Exams), Editura Plumb, Bacău, 2002. 22000044

2. V. Popa, Carte pentru tinerii profesori de matematică (şi nu numai …) (Book for young Math teachers (and not only …)), Editura Egal, Bacău, 2004.