International Conference on Intuitionistic Fuzzy Sets

International Conference on Intuitionistic Fuzzy Sets is a scientific meeting devoted to the intuitionistic fuzzy sets, held in Sofia or Varna, Bulgaria annually since 1997 year. It is organized on the basis of a bilateral agreement for scientific cooperation between Institute of Biophysics and Biomedical Engineering at the Bulgarian Academy of Sciences and Systems Research Institute at the Polish Academy of Sciences.

The papers, presented at the conference, are published in the journal "Notes on Intuitionistic Fuzzy Sets".

1st ICIFS
First ICIFS was held on 18-19 October 1997 in Sofia. The conference proceedings are published in NIFS, Vol. 3, No. 4.

2nd ICIFS
Second ICIFS was held on 3-4 October 1998 in Sofia. The conference proceedings are published in NIFS, Vol. 4, No. 2 and Vol. 4, No. 3.

3rd ICIFS
Third ICIFS was held on 16-17 October 1999 in Sofia. The conference proceedings are published in NIFS, Vol. 5, No. 3.

4th ICIFS
Fourth ICIFS was held on 16-17 September 2000 in Sofia. The conference proceedings are published in NIFS, Vol. 6, No. 3 and Vol. 6, No. 4.

5th ICIFS
Fifth ICIFS was held on 22-23 September 2001 in Sofia. The conference proceedings are published in NIFS, Vol. 7, No. 3 and Vol. 7, No. 4.

6th ICIFS
Sixth ICIFS was held on 13-14 September 2002 in Varna. The conference proceedings are published in Vol. 8, No. 3.

7th ICIFS
Seventh ICIFS was held on 23-24 August 2003 in Sofia. The conference proceedings are published in NIFS, Vol. 9, No. 3 and Vol. 9, No. 4.

8th ICIFS
Eighth ICIFS was held on 20-21 June 2004 in Varna. The conference proceedings are published in NIFS, Vol. 10, No. 3 and Vol. 10, No. 4.

9th ICIFS
Ninth ICIFS was held on 7-8 May 2005 in Sofia. The conference proceedings are published in NIFS, Vol. 11, No. 2, Vol. 11, No. 3, and Vol. 11, No. 4.

10th ICIFS
Tenth ICIFS was held on 28-29 October 2006 in Sofia. The conference proceedings are published in NIFS, Vol. 12, No. 3.

11th ICIFS
Eleventh ICIFS was held on 28-30 April 2007 in Sofia. The conference proceedings are published in NIFS, Vol. 13, No. 2.

12th ICIFS
Twelfth ICIFS was held on 17-18 May 2008 in Sofia. The conference proceedings are published in NIFS, Vol. 14, No. 1 and Vol. 14, No. 2.

13th ICIFS
Thirteenth ICIFS was held on 9-10 May 2009 in Sofia. The conference proceedings are published in NIFS, Vol. 15, No. 1 and Vol. 15, No. 2.

14th ICIFS
The Fourteenth ICIFS was held on 15-16 May 2010 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 16, No. 2.

15th ICIFS
The Fifteenth ICIFS was held on 11-12 May 2011 in Burgas. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 17, No. 2.

16th ICIFS
The Sixteenth ICIFS was held on 9–10 September 2012 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 18, No. 3.

17th ICIFS
The Seventeenth ICIFS was held on 1-2 November 2013 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 19, No. 3.

18th ICIFS
The Eighteenth ICIFS was held on 10-11 May 2014 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 20, No. 2.

19th ICIFS
The Nineteenth ICIFS was held on 4-6 June 2015 in Burgas. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 21, No. 2.

20th ICIFS
The Twentieth ICIFS was held on 2-3 September 2016 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 22, No. 3.

21st ICIFS
The 21st ICIFS was held on 22-23 May 2017 in Burgas. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 23, No. 2.

22nd ICIFS
The 22nd ICIFS was held on 12-13 May 2018 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 24, No. 2.

23rd ICIFS
The 23rd ICIFS was held on 16-17 May 2019 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 25, No. 2.

24th ICIFS
The 24th ICIFS was held on 8-9 October 2020 in Burgas. Selected papers from the conference are published in Notes on Intuitionistic Fuzzy Sets, Vol. 26, No. 3.

25th ICIFS
The 25th Jubilee Edition of ICIFS was held on 9-10 September 2022 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 28, No. 3.

26th ICIFS
The 26th ICIFS was held on 26-27 June 2023 in Sofia. The conference proceedings are published in Notes on Intuitionistic Fuzzy Sets, Vol. 29, No. 2.