New submissions to International Journal "Notes on Intuitionistic Fuzzy Sets" are temporarily suspended from 1 June until 1 September 2026.
Read here the full announcement.
Open Call for Papers: 29th International Conference on Intuitionistic Fuzzy Sets • 6–7 November 2026 • Sofia, Bulgaria / Online
EXTENDED deadline for submissions: 15 June 2026.

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12:26, 20 May 2026 NIFS-32-2-089-104.pdf (file) 271 KB == Summary == {{upload | description = Issue:Intuitionistic fuzzy group subalgebras | author = poonam Kumar Sharma | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 2, pages 89-104 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
11:19, 25 March 2026 NIFS-32-1-068-087.pdf (file) 292 KB == Summary == {{upload | description = Rational divergence measures on intuitionistic fuzzy sets | author = Vladimír Kobza | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 1, pages 68-87 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
21:59, 22 March 2026 NIFS-31-4-427-440.pdf (file) 178 KB updated source [?] -> [4] on page 434 2
23:22, 15 March 2026 NIFS-32-1-051-067.pdf (file) 256 KB == Summary == {{upload | description = Operators on circular interval-valued intuitionistic fuzzy sets | author = P. Gajalaxmi, D. Jayanthi and M. Priyadharshini | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 1, pages 51-67 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
10:37, 13 March 2026 NIFS-32-1-040-050.pdf (file) 198 KB == Summary == {{upload | description = Issue:A variety of functions concerning intuitionistic fuzzy M-clopen sets in intuitionistic fuzzy topological spaces | author = G. Saravanakumar and K. A. Venkatesan | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 1, pages 40-50 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
09:27, 13 March 2026 NIFS-32-1-030-039.pdf (file) 1.29 MB == Summary == {{upload | description = Issue:A modifying operator for temporal intuitionistic fuzzy index matrices with an application to autonomous self-managing databases | author = Veselina Bureva and Krassimir Atanassov | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 1, pages 30-39 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
00:16, 25 February 2026 NIFS-32-1-015-029.pdf (file) 219 KB == Summary == {{upload | description = Issue:Multi-dimensional modal topological structures, extended intuitionistic fuzzy index matrices and multi-person multi-criteria decision making procedures | author = Krassimir Atanassov | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 1, pages 15-29 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
12:21, 24 January 2026 NIFS-32-1-001-014.pdf (file) 222 KB == Summary == {{upload | description = Issue:Invariant intuitionistic fuzzy observables | author = Katarína Čunderlíková | source = Notes on Intuitionistic Fuzzy Sets, Volume 32 (2026), Number 4, pages 1-14 | date = 2026 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
15:58, 29 December 2025 NIFS-31-4-629-645.pdf (file) 852 KB affil 1>2 2
00:35, 19 December 2025 NIFS-31-4-610-628.pdf (file) 494 KB == Summary == {{upload | description = Issue:Analysis of the uncertainty of the service of requests at the attestation stage of a blockchain in an overall telecommunication system | author = Ivan Kavaldzhiev, Velin Andonov, Stoyan Poryazov | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 610-628 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} [[Category:... 1
19:44, 17 December 2025 NIFS-31-4-599-609.pdf (file) 1.55 MB == Summary == {{upload | description = Software for InterCriteria Analysis: Implementation of a normalization step before data processing | author = Deyan Mavrov, Georgi Palichev, Veselina Bureva, Simeon Ribagin | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 599-609 | date = 2025 | licens... 1
15:54, 6 December 2025 NIFS-31-4-532-552.pdf (file) 312 KB Author > Authors 2
21:46, 2 December 2025 IWIFS BB 2025 call for papers.pdf (file) 97 KB   1
21:46, 2 December 2025 IWIFS BB 2025 call for papers.jpg (file) 829 KB   1
12:31, 30 November 2025 NIFS-31-4-586-598.pdf (file) 1.03 MB == Summary == {{upload | description = Application of the InterCriteria Analysis to the universities rankings system in the Republic of Korea | author = Evdokia Sotirova, Taekyun Kim, Vania Georgieva | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 586-598 | date = 2025 | license = Creative... 1
11:55, 30 November 2025 NIFS-31-4-486-495.pdf (file) 186 KB == Summary == {{upload | description = How to take into account monotonicity (and other properties) in centroid approach to fuzzy and intuitionistic fuzzy control | author = Vladik Kreinovich, Olga Kosheleva | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 486-495 | date = 2... 1
10:49, 30 November 2025 NIFS-31-4-568-585.pdf (file) 1.25 MB == Summary == {{upload | description = Sustainable material selection using complex type 2 intuitionistic fuzzy analytic hierarchy process | author = Cengiz Kahraman, Basar Oztaysi, Selcuk Cebi, Sezi Cevik Onar, Alize Yaprak Gül | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 568-585 |... 1
10:12, 30 November 2025 NIFS-31-4-553-567.pdf (file) 1.3 MB == Summary == {{upload | description = A novel complex intuitionistic fuzzy AHP method and its application to electric vehicle selection | author = Cengiz Kahraman, Selcuk Cebi, Basar Oztaysi, Sezi Cevik Onar, Seren Kadikoylu | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 553-567 | date... 1
20:16, 28 November 2025 NIFS-31-4-448-457.pdf (file) 204 KB == Summary == {{upload | description = On some new geometrically motivated operators over intuitionistic fuzzy sets | author = Peter Vassilev, Kristina Zhivkova, Vassia Atanassova, Lyudmila Todorova, Diana Petkova | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 448-457 | date = 2025 | license = Creative Com... 1
10:04, 28 November 2025 NIFS-31-4-522-531.pdf (file) 227 KB == Summary == {{upload | description = Issue:Intuitionistic fuzzy approach to bias correction of users’ QoE estimation in information service networks | author = Peter Georgiev, Stoyan Poryazov, Krassimir Atanassov, Velin Andonov | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 522-531 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} [[Category:PDF fi... 1
09:38, 28 November 2025 NIFS-31-4-511-521.pdf (file) 971 KB == Summary == {{upload | description = Issue:Modeling uncertainty from bidimensional histograms by intuitionistic fuzzy sets | author = Boyan Kolev | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 511-521 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
09:37, 28 November 2025 NIFS-31-4-496-510.pdf (file) 240 KB == Summary == {{upload | description = Issue:K-NN intuitionistic fuzzy classifier | author = Eulalia Szmidt, Janusz Kacprzyk, Paweł Bujnowski | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 496-510 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
01:19, 28 November 2025 NIFS-31-4-479-485.pdf (file) 200 KB == Summary == {{upload | description = Issue:A note on intuitionistic fuzzy countable dense homogeneous spaces | author = T. J. Cinderella, P. B. Vinod Kumar | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 479-485 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
01:06, 28 November 2025 NIFS-31-4-465-478.pdf (file) 225 KB   2
00:51, 28 November 2025 NIFS-31-4-458-464.pdf (file) 194 KB == Summary == {{upload | description = Issue:Coincidence of intuitionistic fuzzy observables | author = Katarína Čunderlíková | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 458-464 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
00:25, 28 November 2025 NIFS-31-4-441-447.pdf (file) 174 KB == Summary == {{upload | description = Issue:A study on extended intuitionistic fuzzy modal operators | author = Sinem Tarsuslu (Yılmaz), Gökhan Çuvalcioğlu | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 4, pages 441-447 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-version = }} Category:PDF files 1
14:20, 13 October 2025 NIFS-31-3-372-385.pdf (file) 563 KB corrected dates 2
23:36, 9 October 2025 NIFS-31-3-402-425.pdf (file) 298 KB corrected references 2
13:07, 9 October 2025 NIFS-31-3-386-401.pdf (file) 293 KB == Summary == {{upload | description = Numerical solution of an intuitionistic fuzzy parabolic partial differential equation using an explicit cubic spline method | author = Deepak Kumar Sah and Sreenivasulu Ballem | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 3, pages 386-401 |... 1
16:48, 8 October 2025 NIFS-31-2-172-194.pdf (file) 302 KB fixed date 3
13:45, 8 October 2025 NIFS-31-3-358-371.pdf (file) 277 KB == Summary == {{upload | description = An investigation of group action on intuitionistic fuzzy primary and semiprimary ideals of Γ-ring | author = Poonam Kumar Sharma | source = Notes on Intuitionistic Fuzzy Sets, Volume 31 (2025), Number 3, pages 358-371 | date = 2025 | license = Creative Commons Attribution (CC BY 4.0) | other-ver... 1
12:48, 7 October 2025 NIFS-29-1-074-083.pdf (file) 234 KB corrected ISSN 2
12:45, 7 October 2025 NIFS-29-1-065-073.pdf (file) 279 KB corrected ISSN 2
12:43, 7 October 2025 NIFS-29-1-046-055.pdf (file) 251 KB corrected ISSN 2
12:40, 7 October 2025 NIFS-29-1-030-045.pdf (file) 263 KB corrected ISSN 2
12:38, 7 October 2025 NIFS-29-1-056-064.pdf (file) 714 KB corrected ISSN 2
12:33, 7 October 2025 NIFS-29-1-001-029.pdf (file) 715 KB corrected issn 2
23:14, 10 September 2025 NIFS-31-3-346-357.pdf (file) 223 KB updated orcids 2
15:02, 22 August 2025 NIFS-31-3-332-345.pdf (file) 350 KB == 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
13:02, 22 August 2025 NIFS-31-3-320-331.pdf (file) 234 KB == 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
10:37, 14 August 2025 NIFS-31-3-305-319.pdf (file) 293 KB == 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
08:58, 7 August 2025 DOAJ-logo.png (file) 5 KB {{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
13:03, 29 July 2025 NIFS-31-2-139-153.pdf (file) 268 KB corrected ISSN 2
12:59, 29 July 2025 NIFS-31-2-127-138.pdf (file) 265 KB corrected ISSN 2
12:56, 29 July 2025 NIFS-31-1-111-126.pdf (file) 375 KB corrected ISSN 3
12:53, 29 July 2025 NIFS-31-1-099-110.pdf (file) 195 KB corrected ISSN 2
12:51, 29 July 2025 NIFS-31-1-080-098.pdf (file) 245 KB corrected ISSN 2
12:48, 29 July 2025 NIFS-31-1-064-079.pdf (file) 231 KB corrected ISSN 2
12:45, 29 July 2025 NIFS-31-1-039-047.pdf (file) 192 KB corrected ISSN 3
12:41, 29 July 2025 NIFS-31-1-015-038.pdf (file) 247 KB corrected ISSN 3
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