ICIFS-2025

28th International Conference on Intuitionistic Fuzzy Sets 27–28 November 2025, Online

ICIFS'2025 is an EUSFLAT ENDORSED EVENT Important dates EXTENDED: 12 October 2025 Submission of manuscripts EXTENDED: 2 November 2025' Peer review process complete, notification of acceptance EXTENDED: 16 November 2025 Submission of revised versions; deadline for payment of early conference fees EXTENDED: 23 November 2025' Payment of late conference fees 27–28 November 2025 Conference dates

Aim and scope

The aim of the annual International Conference on Intuitionistic Fuzzy Sets (ICIFS) is to gather specialists interested in intuitionistic fuzziness, decision making under uncertainty, and other related topics, and to give them floor for discussions on both the theoretical and practical aspects of intuitionistic fuzzy sets. Since 2013, ICIFS has been an EUSFLAT endorsed event.

All papers accepted for presentation at ICIFS'2025 will be published in the Scopus indexed Journal "Notes on Intuitionistic Fuzzy Sets" (SJR 2024 = 0.258, Scopus quartile Q3) and will be freely available online as Open Access under CC-BY 4.0 license.

Conference Chairs and Committee

Conference Chairs

• Janusz Kacprzyk (Poland)
• Krassimir Atanassov (Bulgaria)

Program Committee

• Adrian Ban (Romania)
• Humberto Bustince (Spain)
• Oscar Castillo (Mexico)
• Panagiotis Chountas (United Kingdom)
• Gökhan Çuvalcioğlu (Turkey)
• Katarína Čunderlíková (Slovakia)
• Guy De Tre (Belgium)
• Stefan Hadjitodorov (Bulgaria)
• Cengiz Kahraman (Turkey)
• Etienne Kerre (Belgium)
• Taekyun Kim (Korea)
• Maciej Krawczak (Poland)
• Vladik Kreinovich (United States)
• Patricia Melin (Mexico)
• Said Melliani (Morocco)
• Pedro Melo-Pinto (Portugal)
• Alžbeta Michalíková (Slovakia)
• Javier Montero (Spain)
• Rangasamy Parvathi (India)
• Ketty Peeva (Bulgaria)
• Anthony Shannon (Australia)
• Sotir Sotirov (Bulgaria)
• Evdokia Sotirova (Bulgaria)
• Eulalia Szmidt (Poland)
• Sławomir Zadrożny (Poland)

Organizing Committee

• Olympia Roeva (Bulgaria)
• Vassia Atanassova (Bulgaria)
• Peter Vassilev (Bulgaria)
• Ivo Umlenski (Bulgaria)

Instructions for the Manuscripts and Presentations

Submissions should be up to 25 pages and compliant with the paper template of the Journal "Notes on Intuitionistic Fuzzy Sets" and the Journal's Publication Ethics Policy. Manuscripts will be subject to rigorous peer review by two independent reviewers.

Presentations should be 15 minutes with 5 minutes for questions and answers. Links to the Zoom platform for online videoconferencing will be timely provided to the presenting authors of the accepted conference submissions. Participants are requested to give their talk in real time, but prepare and submit in advance a back-up video of their presentation which will be streamed in case of any technical problems at the time of their presentation.

E-mail for paper submissions and conference correspondence: icifs.office@gmail.com

Registration

	Regular participants	Students and EUSFLAT members
Early payment: 8 November 2025	EUR 50.00	EUR 30.00
Late payment: 18 November 2025	EUR 80.00	EUR 50.00
Note:	Details about bank transfer will be provided upon manuscript acceptance. All bank transfer fees are on behalf of the participant.

Registration fee includes conference access and certificate for presentation.

27 November – Thursday

Bulgarian time (EEST)	Presenter's local time	Author(s) / Presenter	Paper title
10:00-10:10	OPENING CEREMONY
10:10-10:40		Krassimir Atanassov, Nora Angelova, Janusz Kacprzyk	KEYNOTE: Intuitionistic fuzzy interpretation of a classical formula
10:40-11:00	14:10-14:30	T. J. Cinderella, P. B. Vinod Kumar	A note on intuitionistic fuzzy countable dense homogeneous spaces
11:00-11:20	12:00-12:20	Sinem Tarsuslu (Yılmaz), Gökhan Çuvalcioğlu	A study on extended intuitionistic fuzzy modal operators
11:20-11:40		Peter Vassilev, Kristina Zhivkova, Vassia Atanassova, Lyudmila Todorova, Diana Petkova	On some new geometrically motivated operators over intuitionistic fuzzy sets
11:40-12:00		Evdokia Sotirova, Taekyun Kim, Vania Georgieva	Application of the InterCriteria Analysis to the universities rankings system in the Republic of Korea
12:00-12:20	11:00-11:20	Eulalia Szmidt, Janusz Kacprzyk, Paweł Bujnowski	k-NN intuitionistic fuzzy classifier
12:20-12:40	11:20-11:40	Katarina Cunderlikova	Coincidence of intuitionistic fuzzy observables
12:40-13:00		Boyan Kolev	Modeling uncertainty from bidimensional histograms by intuitionistic fuzzy sets
13:00-13:30		Poonam Kumar Sharma	INVITED TALK: Intuitionistic fuzzy group algebra
13:30-14:20	LUNCH
14:20-14:40	15:20-15:40	Cengiz Kahraman, Selcuk Cebi, Basar Oztaysi, Sezi Cevik Onar, Seren Kadikoylu	A novel complex intuitionistic fuzzy AHP method and its application to electric vehicle selection
14:40-15:00	15:40-16:00	Gökhan Çuvalcioğlu, Dilara Gündoğdu, Fatma Özel	A multi-criteria decision making method to measure offset printing quality according to paper type: Intuitionistic fuzzy entropy based TOPSIS method
15:00-15:20	16:00-16:20	Cengiz Kahraman, Basar Oztaysi, Selcuk Cebi, Sezi Cevik Onar, Alize Yapral Gul	Sustainable material selection using complex type 2 intuitionistic fuzzy analytic hierarchy process
15:20-15:40		Peter Georgiev, Stoyan Poryazov, Krassimir Atanassov, Velin Andonov	Intuitionistic fuzzy approach to bias correction of users’ QoE estimation in information service networks
15:40-16:00	COFFEE BREAK
16:00-16:40	07:00-07:40	Vladik Kreinovich, Olga Kosheleva	INVITED TALK: How to take into account monotonicity (and other properties) in centroid approach to fuzzy and intuitionistic fuzzy control
16:40	CLOSING

28 November – Friday

FREE DISCUSSIONS

Contacts

• Organizer: Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences
• Contact person: Acad. Krassimir Atanassov
• Phone: 0035929793602
• Email: icifs.office@gmail.com    and    k.t.atanassov@gmail.com