Previous conferences

The theory of rough sets was introduced by Zdzislaw Pawlak in early 1980s. It is based on a simple recognition of the fact that the ability to describe a set of objects is constrained by our limitation in distinguishing individual members of the set. In general, only classes of objects rather than individuals can be distinguished. Some elementary classes of this relation may be inconsistent, i.e. they include objects having the same descriptions but assigned to different categories. As a consequence of the above inconsistency it is not possible, in general, to precisely specify a set of objects in terms of elementary sets of indiscernible objects. To deal with this ambiguity the concept of the rough set is introduced which is a pair of two precise concepts -- lower and upper approximations constructed from elementary sets of objects. This idea is a starting point to study many other problems, in particular, analysis of classification problems, evaluating dependency between attributes and objects classification, determining the level of this dependency, calculating importance of attributes, reducing the set of attributes or generating decision rules from data. The rough set theory is complementary to fuzzy set theory and soft computing methods as it handles another kind of information vagueness and inconsistency. On the other hand these theories considered together provide strong tools for analysis of data burden with some kind of “imperfectness”, such as vagueness, ambiguity, imprecision, incompleteness, and uncertainty. The rough set theory turned out to be a significant methodological tool for such domains as artificial intelligence, data mining, classification, knowledge discovery, machine learning, information retrieval, control engineering and decision analysis. Finally, it inspired many real life applications.

• First International Workshop on Rough Sets - State of the Art and Perspectives. Kiekrz-Poznan, Poland, September 2-4, 1992.
• International Workshop on Rough Sets, Fuzzy Sets and Knowledge Discovery (RSKD'93). Banff, Canada, October 12-15, 1993.
• International Workshop on Rough Sets Soft Computing (RSSC'94). San Jose, USA, November 10-12, 1994.
• International Workshop on Rough Sets, Fuzzy Sets and Machine Discovery (RSFD'96). Tokyo, Japan, November 6-8, 1996.
• First International Conference on Rough Sets and Soft Computing (RSCTC'98). Warszawa, Poland, June 22-27, 1998.
• International Workshop on New Directions in Rough Sets, Data Mining, and Granular-Soft Computing (RSFDGrC'99). Yamaguchi, Japan, November 9-11 1999.
• Second International Conference on Rough Sets and New Trends in Computing (RSCTC'2000). Banff, Canada, October 16-19, 2000.
• International Workshop on Rough Set Theory and Granular Computing (RSGrC'2001), Matsue City, Japan, May 20-25, 2001.
• Third International Conference on Rough Sets and New Trends in Computing (RSCTC'2002). Malvern, USA, October 14-16, 2002.
• International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Computing (RSFDGrC'2003), Chongqing, China, May 26-29, 2003.
• Fourth International Conference on Rough Sets and Current Trends in Computing (RSCTC'2004). Uppsala, Sweden, June 1-5, 2004.
• International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Computing (RSFDGrC'2005). Regina, Canada, September 1-3, 2005.
• International Conference on Rough Sets and Knowledge Technology (RSKT'2006). Chongqing, China, July 24-26, 2006.
• Fifth International Conference on Rough Sets and Current Trends in Computing (RSCTC'2006). Kobe, Japan, November 6-8, 2006.
• The 2007 Joint Rough Set Symposium, JRS07, which was combination of RSFDGrC 2007 and RSKT 2007
• Rough Sets and Intelligent Systems Paradigms, International Conference, RSEISP 2007
• Rough Sets and Current Trends in Computing, 6th International Conference, RSCTC 2008, Akron, OH, USA, October 23-25, 2008
• Rough Sets and Knowledge Technology, Third International Conference, RSKT 2008, Chengdu, China, May 17-19, 2008
• Rough Sets and Knowledge Technology, 4th International Conference, RSKT 2009, Gold Coast, Australia, July 14-16, 2009
• Rough Sets, Fuzzy Sets, Data Mining and Granular Computing, 12th International Conference, RSFDGrC 2009, Delhi, India, December 15-18, 2009
• Workshop Rough Set Theory (RST), Milano, Italy, May 25-27, 2009
• Rough Sets and Current Trends in Computing, RSCTC 2010, Warsaw, Poland, June 28-30, 2010
• The Fifth International Conference on Rough Set and Knowledge Technology, Beijing Jiaotong University, Beijing, China, October 15-17, 2010
• Second International Workshop on ROUGH SETS THEORY(RST10), Zhejiang Ocean University, Zhoushan, Zhejiang, China, October 19-21, 2010