Title of article
The ϑ-lower and T-upper fuzzy rough approximation operators on a semigroup
Author/Authors
Fei Li، نويسنده , , Yunqiang Yin، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
15
From page
241
To page
255
Abstract
In this paper, we consider a semigroup as a universal set and investigate the properties of ϑ-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 ϑ-lower and T-upper fuzzy rough approximation operators are investigated.
Keywords
?-lower fuzzy rough approximation operator , TL-fuzzy semigroup , (? , T-upper fuzzy rough approximation operator , T)-fuzzy rough semigroup , L-fuzzy relation , T-congruence L-fuzzy relation
Journal title
Information Sciences
Serial Year
2012
Journal title
Information Sciences
Record number
1215066
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