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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11:40, 7 October 2025 NIFS-29-1-030-045.pdf (file) 263 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:38, 7 October 2025 NIFS-29-1-056-064.pdf (file) 714 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:33, 7 October 2025 NIFS-29-1-001-029.pdf (file) 715 KB Vassia Atanassova (talk | contribs) corrected issn 2
22:14, 10 September 2025 NIFS-31-3-346-357.pdf (file) 223 KB Vassia Atanassova (talk | contribs) updated orcids 2
14:02, 22 August 2025 NIFS-31-3-332-345.pdf (file) 350 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Evaluation and forecasting of technical conditions in complex systems using intuitionistic fuzzy logics | author = Toncho Ivanov Boyukov | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 3, pages 332-345 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0... 1
12:02, 22 August 2025 NIFS-31-3-320-331.pdf (file) 234 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = On the degree of intuitionistic fuzzy functions and its various classification degrees | author = Ümit Deniz and Neslihan Yılmaz | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 3, pages 320-331 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version =... 1
09:37, 14 August 2025 NIFS-31-3-305-319.pdf (file) 293 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = On the (min,max)-transitivity of some intuitionistic fuzzy binary relations associated with probability distributions on pre-orders | author = Landry Ngibasona, Bertrand Mbama Engoulou, Louis Aimé Fono | source = [[Notes on Intuitionistic Fuzzy Sets/31/3|Notes on Intuitionistic Fuzzy Sets, Volume 31... 1
07:58, 7 August 2025 DOAJ-logo.png (file) 5 KB Vassia Atanassova (talk | contribs) {{upload | description = [https://doaj.org/ Logo of DOAJ - Directory of Open Access Journals] | author = Directory of Open Access Journals | source = https://commons.wikimedia.org/wiki/File:DOAJ_logo-colour.svg | date = 2021 | license = Public domain / trademarked | other-version = }} 1
12:03, 29 July 2025 NIFS-31-2-139-153.pdf (file) 268 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:59, 29 July 2025 NIFS-31-2-127-138.pdf (file) 265 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:56, 29 July 2025 NIFS-31-1-111-126.pdf (file) 375 KB Vassia Atanassova (talk | contribs) corrected ISSN 3
11:53, 29 July 2025 NIFS-31-1-099-110.pdf (file) 195 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:51, 29 July 2025 NIFS-31-1-080-098.pdf (file) 245 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:48, 29 July 2025 NIFS-31-1-064-079.pdf (file) 231 KB Vassia Atanassova (talk | contribs) corrected ISSN 2
11:45, 29 July 2025 NIFS-31-1-039-047.pdf (file) 192 KB Vassia Atanassova (talk | contribs) corrected ISSN 3
11:41, 29 July 2025 NIFS-31-1-015-038.pdf (file) 247 KB Vassia Atanassova (talk | contribs) corrected ISSN 3
11:39, 29 July 2025 NIFS-31-1-009-014.pdf (file) 178 KB Vassia Atanassova (talk | contribs) corrected ISSN 3
11:36, 29 July 2025 NIFS-31-1-001-008.pdf (file) 213 KB Vassia Atanassova (talk | contribs) corrected ISSN 3
08:27, 24 July 2025 NIFS-31-3-290-304.pdf (file) 255 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = ''R''<sub>1</sub> and level ''R''<sub>1</sub> separation axioms on intuitionistic fuzzy pairwise topological spaces using intuitionistic fuzzy open sets | author = Saikh Shahjahan Miah, Md. Hridoy Hasan, Ruhul Amin, Nigar Sultana | source = [[Notes on Intuitionistic Fuzzy Sets/31/3|Notes on Intuitionistic... 1
17:01, 19 July 2025 NIFS-31-3-267-289.pdf (file) 375 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Intuitionistic fuzzy Laplace Adomian decomposition method for solving intuitionistic fuzzy differential equations of higher order | author = Razika Ettoussi, Said Melliani and Lalla Saadia Chadli | source = [[Notes on Intuitionistic Fuzzy Sets/31/3|Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025),... 1
11:24, 17 July 2025 NIFS-31-2-242-252.pdf (file) 178 KB Vassia Atanassova (talk | contribs) KP-06-N72/8 2
05:40, 17 July 2025 NIFS-31-2-253-266.pdf (file) 746 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Some new extension principles for intuitionistic fuzzy sets | author = Mohammad Kamrul Hasan | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 253-266 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
09:36, 1 July 2025 NIFS-31-2-227-241.pdf (file) 253 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Issue:Triangular norm-based intuitionistic fuzzy BE-algebras and filters | author = Sinem Tarsuslu | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 227-241 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
17:33, 26 June 2025 NIFS-31-2-195-206.pdf (file) 788 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = (α,β)-Interval-valued intuitionistic fuzzy subgroups | author = Gökhan Çuvalcıoğlu and Arif Bal | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 195-206 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
15:55, 25 June 2025 NIFS-31-2-217-226.pdf (file) 202 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Solving second order intuitionistic fuzzy differential equation by intuitionistic fuzzy Sumudu transform method | author = Razika Ettoussi, Said Melliani and Lalla Saadia Chadli | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 217-226 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
13:29, 25 June 2025 NIFS-31-2-207-216.pdf (file) 196 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Cartesian product of intuitionistic fuzzy subgroups | author = Saman Abdurrahman | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 207-216 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
14:07, 27 May 2025 NIFS-31-2-154-171.pdf (file) 1.16 MB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:An extended framework for autocratic multi-parameter group decision making using interval-valued intuitionistic fuzzy numbers | author = Mousumi Akter, Sahadat Hossain, Fazlul Hoque, Rafiqul Islam, nd Nasimul Karim | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 2, pages 154-171 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | othe... 1
21:51, 6 March 2025 NIFS-TeX-template-2025.zip (file) 132 KB Vassia Atanassova (talk | contribs) Category:Notes on IFS 1
21:51, 6 March 2025 NIFS-Word-template-2025.zip (file) 53 KB Vassia Atanassova (talk | contribs) Category:Notes on IFS 1
17:35, 6 March 2025 NIFS-31-1-048-063.pdf (file) 1,013 KB Vassia Atanassova (talk | contribs)   2
15:07, 6 March 2025 ORCID iD.svg.png (file) 1 KB Vassia Atanassova (talk | contribs)   1
11:17, 18 December 2024 NIFS-30-4-368-373.pdf (file) 284 KB Vassia Atanassova (talk | contribs)   2
20:58, 16 December 2024 NIFS-26-1-23-27.pdf (file) 133 KB Vassia Atanassova (talk | contribs) Corrected typo in title (intitionistic > intuitionistic) 2
16:36, 16 December 2024 NIFS-30-4-323-332.pdf (file) 228 KB Vassia Atanassova (talk | contribs)   1
14:58, 16 December 2024 NIFS-30-4-285-296.pdf (file) 240 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Intuitionistic fuzzy temporal operators and temporal topological structures | author = Krassimir Atanassov | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 4, pages 285-296 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
23:46, 13 December 2024 NIFS-30-4-349-367.pdf (file) 302 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Solvability of an intuitionistic fuzzy fractional differential equation of second type | author = Hamid Sadiki, Khadija Oufkir, Aziz El Ghazouani, M'hamed Elomari | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 4, pages 349-367 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
23:32, 13 December 2024 NIFS-30-4-309-322.pdf (file) 229 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Intuitionistic fuzzy Nakayama’s Lemma | author = S. Achik, I. Bakhadach, M. Oukessou, S. Melliani | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 4, pages 309-322 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
23:29, 13 December 2024 NIFS-30-4-333-348.pdf (file) 229 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Comparison study based on the divergence measures between intuitionistic fuzzy sets and some applications | author = Vladimír Kobza | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 4, pages 333-348 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
14:03, 13 December 2024 NIFS-30-4-297-308.pdf (file) 291 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = On intuitionistic fuzzy chained modules | author = P. K. Sharma | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 4, pages 297-308 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
13:40, 25 November 2024 NIFS-30-1-092-100.pdf (file) 331 KB Vassia Atanassova (talk | contribs) correction on page 99 2
10:38, 27 October 2024 NIFS-30-3-260-284.pdf (file) 251 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = A general approach to modal topological structures illustrated by intuitionistic fuzzy objects | author = Krassimir Atanassov | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 3, pages 260-284 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
17:29, 19 October 2024 NIFS-30-3-242-259.pdf (file) 2.35 MB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Analysis of hub parameters in fuzzy hypergraphs extending to intuitionistic fuzzy threshold hypergraphs: Applications in designing transport networks in amusement parks using hub hyperpaths | author = K. K. Myithili, C. Nandhini | source = [[Notes... 1
15:13, 18 October 2024 NIFS-30-3-230-241.pdf (file) 230 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Intuitionistic fuzzy normal bi-topological space-approach of intuitionistic fuzzy open sets | author = Saikh Shahjahan Miah, Jewel Miah, Ruhul Amin, Nigar Sultana | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 3, pages 230-241 | date = 2024 | license = | other-ver... 1
17:55, 11 October 2024 NIFS-30-3-215-229.pdf (file) 264 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Intuitionistic fuzzy evolution problem with nonlocal conditions | author = Hamid Sadiki, Khadija Oufkir, Said Melliani, M'hamed El Omari | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 3, pages 215-229 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
16:46, 10 October 2024 NIFS-30-3-203-214.pdf (file) 241 KB Vassia Atanassova (talk | contribs) == Summary == {{upload | description = Issue:Zariski topology on the spectrum of intuitionistic fuzzy classical primary submodules | author = P. K. Sharma | source = Notes on Intuitionistic Fuzzy Sets, Volume 30 (2024), Number 3, pages 203-214 | date = 2024 | license = CC-BY 4.0 | other-version = }} Category:PDF files 1
15:31, 29 August 2024 NIFS-09-4-102-108.pdf (file) 3.36 MB Vassia Atanassova (talk | contribs) {{upload | description = A generalized net model of the process of face recognition with elements of intuitionistic fuzziness | author = Anthony Shannon, Georgi Gluhchev, Vasil Vasilev, Krassimir Atanassov, Stefan Hadjitodorov | source = "Notes on Intuitionistic Fuzzy Sets", Volume 9, Number 4, Pages 102-108 | date =... 1
15:22, 29 August 2024 NIFS-09-4-114-122.pdf (file) 5.04 MB Vassia Atanassova (talk | contribs) {{upload | description = Temporal aspects of web log analysis | author = Ilias Petrounias, Ahmed Aburodes Assaid Elkilany, Panagiotis Chountas, Boyan Kolev | source = "Notes on Intuitionistic Fuzzy Sets", Volume 9, Number 4, Pages 114-122 | date = 2003 | license = | other-version = }} Category:PDF files 1
15:09, 29 August 2024 NIFS-09-4-123-128.pdf (file) 3.62 MB Vassia Atanassova (talk | contribs) {{upload | description = Generalized net model of the intranet in a university, using intuitionistic fuzzy estimations | author = Anthony Shannon, Daniela Orozova, Dimitar Sasselov, Evdokia Sotirova, Ilias Petrounias, Krassimir Atanassov, Maciej Krawczak, Pedro Melo-Pinto, Seog-Hoon Rim, Taekyun Kim | source = [[Notes on Intuitionistic Fuzzy Sets/0... 1
15:01, 29 August 2024 NIFS-09-4-140-150.pdf (file) 5.31 MB Vassia Atanassova (talk | contribs) {{upload | description = Intuitionistic fuzzy generalized net models of the elements of a system for softened water production | author = Joanna Alexieva, Boyan Kolev | source = "Notes on Intuitionistic Fuzzy Sets", Volume 9, Number 4, Pages 140-150 | date = 2003 | license = | other-version = }} Category:PDF files 1
14:50, 29 August 2024 NIFS-09-4-077-082.pdf (file) 3.27 MB Vassia Atanassova (talk | contribs) {{upload | description = A note on intuitionistic fuzzy routing | author = Channappa Akki, Ranjit Biswas | source = "Notes on Intuitionistic Fuzzy Sets", Volume 9, Number 4, Pages 77-82 | date = 2003 | license = | other-version = }} Category:PDF files 1
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