The ϑ-lower and T-upper fuzzy rough approximation operators on a semigroup

Authors:
Fei Li;Yunqiang Yin
Affiliations:
Department of Mathematics, Beijing Forestry University, Beijing 100083, PR China;School of Mathematics and Information Sciences, East China Institute of Technology, Fuzhou, Jiangxi 344000, PR China
Venue:
Information Sciences: an International Journal
Year:
2012

Citing 35
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Abstract

In this paper, we consider a semigroup as a universal set and investigate the properties of @q-lower and T-upper fuzzy rough approximation operators. A new fuzzy algebraic structure, called a TL-fuzzy rough semigroup, is introduced and some related properties are studied. Finally, the homomorphism properties of @q-lower and T-upper fuzzy rough approximation operators are investigated.