This book constitutes the refereed proceedings of the International Joint Conference on Rough
Sets IJCRS 2016 held in Santiago de Chile Chile in October 2016. The 46 revised full papers
presented together with 7 keynotes tutorials and expert papers were carefully reviewed and
selected from 108 submissions. The papers are grouped in topical sections on Rough Sets
Approximation and Granulation Rough Sets Non-Determinism and Incompleteness Rough Sets and
Three-way Decisions Fuzziness and Similarity in Knowledge Representation Machine Learning and
Decision Making Ranking and Clustering Derivation and Application of Rules and Trees
Derivation and Application of Feature Subsets.