Volume IV of the Transactions on Rough Sets (TRS) introduces a number of
new advances in the theory and application of rough sets. Rough sets and approximation
spaces were introduced more than 30 years ago by Zdzis
law Pawlak.
These advances have profound implications in a number of research areas such
as the foundations of rough sets, approximate reasoning, artificial intelligence,
bioinformatics, computational intelligence, cognitive science, intelligent systems,
data mining, machine intelligence, and security. In addition, it is evident from the
papers included in this volume that the foundations and applications of rough
sets is a very active research area worldwide. A total of 16 researchers from 7
countries are represented in this volume, namely, Canada, India, Norway, Sweden,
Poland, Russia and the United States of America. Evidence of the vigor,
breadth and depth of research in the theory and applications of rough sets can
be found in the 10 articles in this volume.