Open Call for Papers: 29th International Conference on Intuitionistic Fuzzy Sets • 6–7 November 2026 • Sofia, Bulgaria / Online
NEW EXTENDED deadline for submissions: 15 AUGUST 2026.

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18:48, 30 December 2016 NIFS-22-4-53-63.pdf (file) 215 KB Vassia Atanassova (talk | contribs) {{upload | description = The Cauchy problem for complex intuitionistic fuzzy differential equations | author = A. El Allaoui, S. Melliani and [[L. S. Chadli]... 1
18:48, 30 December 2016 NIFS-22-4-42-52.pdf (file) 226 KB Vassia Atanassova (talk | contribs) {{upload | description = Numerical solution of intuitionistic fuzzy differential equations by Runge–Kutta Method of order four | autho... 1
18:47, 30 December 2016 NIFS-22-4-25-41.pdf (file) 318 KB Vassia Atanassova (talk | contribs) {{upload | description = [[Issue:Solving intuitionistic fuzzy differential equations with linear differential operator by Adomian decomposition method|Solving intuitionistic fuzzy differential equations with linear differential operator by Adomian dec... 1
18:47, 30 December 2016 NIFS-22-4-13-24.pdf (file) 261 KB Vassia Atanassova (talk | contribs) {{upload | description = On generalized double statistical convergence of order α in intuitionistic fuzzy <em>n</em>-normed spaces | author =... 1
18:46, 30 December 2016 NIFS-22-4-06-12.pdf (file) 131 KB Vassia Atanassova (talk | contribs) {{upload | description = Properties of the intuitionistic fuzzy implication →<sub>186</sub> | author = [Krassimir Atanassov]], Nora Angelova, Eulalia Szmidt and [[Janusz Ka... 1
18:46, 30 December 2016 NIFS-22-4-01-05.pdf (file) 156 KB Vassia Atanassova (talk | contribs) {{upload | description = Some intuitionistic fuzzy operators | author = Mehmet Çitil and Feride Tuğrul | source = Notes on Intuitionistic Fuzzy Sets/22/4 | date = 2016 | license = | ot... 1
08:57, 17 November 2016 DRJI-logo.png (file) 192 KB Vassia Atanassova (talk | contribs) Category:Logos 1
21:09, 31 October 2016 Ezl-logo.jpg (file) 21 KB Vassia Atanassova (talk | contribs) Category:Logos 1
10:37, 28 October 2016 NIFS-online-availability-pie-2016-10.png (file) 7 KB Vassia Atanassova (talk | contribs) Category:Notes on IFS performance graphs 1
10:35, 28 October 2016 NIFS-online-availability-2016-10.png (file) 17 KB Vassia Atanassova (talk | contribs) Category:Notes on IFS performance graphs 1
10:26, 28 October 2016 NIFS-outreach-SCOPUS-2016-10.png (file) 17 KB Vassia Atanassova (talk | contribs) Category:Notes on IFS performance graphs 1
22:40, 27 October 2016 Road-logo.png (file) 18 KB Vassia Atanassova (talk | contribs) Category:Logos 1
22:40, 27 October 2016 Index-copernicus-logo.png (file) 26 KB Vassia Atanassova (talk | contribs) Category:Logos 1
22:39, 27 October 2016 Worldcat-logo.png (file) 4 KB Vassia Atanassova (talk | contribs) Category:Logos 1
22:39, 27 October 2016 Zbmath-logo.gif (file) 1 KB Vassia Atanassova (talk | contribs) Category:Logos 1
10:17, 9 September 2016 NIFS-22-2-064-070.pdf (file) 175 KB Peter Vassilev (talk | contribs)   1
10:16, 9 September 2016 NIFS-22-2-099-107.pdf (file) 310 KB Peter Vassilev (talk | contribs)   1
10:16, 9 September 2016 NIFS-22-2-108-118.pdf (file) 286 KB Peter Vassilev (talk | contribs)   1
10:16, 9 September 2016 NIFS-22-2-087-098.pdf (file) 314 KB Peter Vassilev (talk | contribs)   1
10:15, 9 September 2016 NIFS-22-2-071-086.pdf (file) 355 KB Peter Vassilev (talk | contribs)   1
10:15, 9 September 2016 NIFS-22-2-059-063.pdf (file) 152 KB Peter Vassilev (talk | contribs)   1
10:15, 9 September 2016 NIFS-22-2-052-058.pdf (file) 206 KB Peter Vassilev (talk | contribs)   1
10:15, 9 September 2016 NIFS-22-2-044-051.pdf (file) 188 KB Peter Vassilev (talk | contribs)   1
10:14, 9 September 2016 NIFS-22-2-032-043.pdf (file) 272 KB Peter Vassilev (talk | contribs)   1
10:14, 9 September 2016 NIFS-22-2-022-031.pdf (file) 187 KB Peter Vassilev (talk | contribs)   1
10:14, 9 September 2016 NIFS-22-2-013-021.pdf (file) 211 KB Peter Vassilev (talk | contribs)   1
10:14, 9 September 2016 NIFS-22-2-001-012.pdf (file) 186 KB Peter Vassilev (talk | contribs)   1
16:45, 1 September 2016 NIFS-22-3-120-130.pdf (file) 264 KB Peter Vassilev (talk | contribs) {{upload | description = Intercriteria analysis for evaluation of the pollution of the Struma River in the Bulgarian section | author = Tati... 1
16:45, 1 September 2016 NIFS-22-3-112-119.pdf (file) 189 KB Peter Vassilev (talk | contribs) {{upload | description = [[Issue:An application of intercriteria decision making method to the rankings of universities in the United Kingdom|An application of intercriteria decision making method to the rankings of universities in the United Kingdom]... 1
16:43, 1 September 2016 NIFS-22-3-106-111.pdf (file) 167 KB Peter Vassilev (talk | contribs) {{upload | description = Operation "concatenation" over intuitionistic fuzzy index matrices | author = Anthony Shannon, Vassia Atanassova and Krassimir Atanassov | sourc... 1
16:42, 1 September 2016 NIFS-22-3-080-090.pdf (file) 194 KB Peter Vassilev (talk | contribs) {{upload | description = Evolution problem with intuitionistic fuzzy fractional derivative | author = M. Elomari, S. Melliani and L. S. Chadli | source = [[Notes on Intu... 1
16:39, 1 September 2016 NIFS-22-3-070-079.pdf (file) 240 KB Peter Vassilev (talk | contribs) {{upload | description = Solution of system of first order linear differential equations in intuitionistic fuzzy environment | author = Ne... 1
16:38, 1 September 2016 NIFS-22-3-047-069.pdf (file) 321 KB Peter Vassilev (talk | contribs) {{upload | description = [[Issue:Numerical solution of intuitionistic fuzzy differential equations by Adams' three order predictor-corrector method|Numerical solution of intuitionistic fuzzy differential equations by Adams' three order predictor-corre... 1
16:37, 1 September 2016 NIFS-22-3-034-046.pdf (file) 207 KB Peter Vassilev (talk | contribs) {{upload | description = Intuitionistic fuzzy superfluous submodule | author = Poonam Kumar Sharma and Gagandeep Kaur | source = Notes on Intuitionistic Fuzzy Sets/22/3 | date = 2016 | lic... 1
16:35, 1 September 2016 NIFS-22-3-025-033.pdf (file) 130 KB Peter Vassilev (talk | contribs) {{upload | description = Properties of the intuitionistic fuzzy implications and negations | author = Nora Angelova and Krassimir Atanassov | source = [[Notes on Intuitioni... 1
16:34, 1 September 2016 NIFS-22-3-021-024.pdf (file) 124 KB Peter Vassilev (talk | contribs) {{upload | description = On obtaining intuitionistic fuzzy estimates for similarity of strings | author = Peter Vassilev and Todor Stoyanov | source = [[Notes on Intuiti... 1
16:32, 1 September 2016 NIFS-22-3-014-020.pdf (file) 162 KB Peter Vassilev (talk | contribs) {{upload | description = New properties of the intuitionistic fuzzy modal operator ⊗<sub>α,β,γ,δ</sub> | author = Vassia Atanassova, Gökhan Çuvalcioğlu, Sine... 1
16:29, 1 September 2016 NIFS-22-3-009-013.pdf (file) 135 KB Peter Vassilev (talk | contribs) {{upload | description = On IF-numbers | author = Daniela Kluvancová and Beloslav Riečan | source = Notes on Intuitionistic Fuzzy Sets/22/3 | date = 2016 | license = | other-version = }} Category:PDF files 1
16:27, 1 September 2016 NIFS-22-3-001-008.pdf (file) 132 KB Peter Vassilev (talk | contribs) {{upload | description = New Fodor's type of intuitionistic fuzzy implication and negation | author = Krassimir Atanassov, Eulalia Szmidt and Janusz Kacprzyk | source = [[N... 1
16:21, 1 September 2016 Concatenation.png (file) 991 bytes Peter Vassilev (talk | contribs) Category:PNG files 1
17:15, 30 May 2016 NIFS-22-1-78-88.pdf (file) 190 KB Vassia Atanassova (talk | contribs) - extra keyword 2
15:22, 30 May 2016 NIFS-22-1-35-47.pdf (file) 264 KB Vassia Atanassova (talk | contribs) fixed capital letters 2
13:47, 30 May 2016 NIFS-22-1-63-77.pdf (file) 189 KB Vassia Atanassova (talk | contribs) {{upload | description = (∈, ∈∨q)-Intuitionistic fuzzy prime ideals of BCK–algebras | author = S. R. Barbhuiya and D. K. Basnet | source = [[Notes on Intui... 1
13:47, 30 May 2016 NIFS-22-1-53-62.pdf (file) 348 KB Vassia Atanassova (talk | contribs) {{upload | description = Arc analysis in the intuitionistic fuzzy graph and its applications | author = V. Nivethana and A. Parvathi | source = [[Notes on Intuiti... 1
13:46, 30 May 2016 NIFS-22-1-48-52.pdf (file) 144 KB Vassia Atanassova (talk | contribs) {{upload | description = Uniformly expanding intuitionistic fuzzy operator | author = Krassimir Atanassov | source = [[Notes on Intuitionistic Fuzzy Sets/22/1|"Notes on IFS", Volume 22... 1
13:44, 30 May 2016 NIFS-22-1-27-34.pdf (file) 166 KB Vassia Atanassova (talk | contribs) {{upload | description = On IF-semistates | author = Beloslav Riečan | source = "Notes on IFS", Volume 22 (2016) Number 1 | date = 2016 | license = | other-version = }... 1
13:43, 30 May 2016 NIFS-22-1-13-26.pdf (file) 209 KB Vassia Atanassova (talk | contribs) {{upload | description = k-Intuitionistic fuzzy structures | author = P. Suseela, M. Shakthiganesan and R. Vembu | source = [[Notes on Intuitionistic Fuzzy Sets/22/1|"Notes on IFS", Volume 22 (... 1
13:43, 30 May 2016 NIFS-22-1-07-12.pdf (file) 142 KB Vassia Atanassova (talk | contribs) {{upload | description = [[Issue:On intuitionistic fuzzy norms and distances generated by the intuitionistic fuzzy subtractions ¬'11 and ¬''11|On intuitionistic fuzzy norms and distances generated by the intuitionistic fuzzy subtractions ¬'<sub>11<... 1
13:38, 30 May 2016 NIFS-22-1-01-06.pdf (file) 162 KB Vassia Atanassova (talk | contribs) {{upload | description = Remark on Dworniczak's intuitionistic fuzzy implications. Part 3 | author = Lilija Atanassova | source = [[Notes on Intuitionistic Fuzzy Sets/22/... 1
22:57, 29 February 2016 NIFS-09-2-61-73.pdf (file) 5.3 MB Vassia Atanassova (talk | contribs) {{upload | description = Intuitionistic fuzzy lists | author = B. K. Tripathy, P. K. Choudhury | source = Notes on Intuitionistic Fuzzy Sets/09/2 | date = 2003 | license = | other-version = }} [[Categor... 1
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