Constructive and algebraic methods of the theory of rough sets
Information Sciences: an International Journal
Rough Sets: Theoretical Aspects of Reasoning about Data
Rough Sets: Theoretical Aspects of Reasoning about Data
Discrete Mathematical Structures
Discrete Mathematical Structures
Rough Sets: Mathematical Foundations
Rough Sets: Mathematical Foundations
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AFSS '02 Proceedings of the 2002 AFSS International Conference on Fuzzy Systems. Calcutta: Advances in Soft Computing
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RSCTC '08 Proceedings of the 6th International Conference on Rough Sets and Current Trends in Computing
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Knowledge-Based Systems
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International Journal of Approximate Reasoning
Transformation of bipolar fuzzy rough set models
Knowledge-Based Systems
Topological characterizations of covering for special covering-based upper approximation operators
Information Sciences: an International Journal
Graded rough set model based on two universes and its properties
Knowledge-Based Systems
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Knowledge-Based Systems
On the structure of the multigranulation rough set model
Knowledge-Based Systems
On the topological properties of generalized rough sets
Information Sciences: an International Journal
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This paper considers transformation of rough set models containing union, intersection, inverse and composition of approximation spaces. As special cases, approximation spaces induced from several kinds of closures of relations are also investigated. The main results given in this paper will be useful to theoretical and practical researches of rough set theory.