T--Rough(T+-Rough) Ideals in T--Rough (T+-Rough) Semigroups Based on Upper (Lower) Approximation Spaces

Khodaii, S; Anvariyeh, SM; Davvaz, B; Mirvakili, S

Khodaii, S (通讯作者)，Yazd Univ, Dept Math Sci, Yazd, Iran.

SOUTHEAST ASIAN BULLETIN OF MATHEMATICS, 2023; 47 (4): 463

Abstract

This paper concerns the behavior of semigroups with set valued mappings. By using the notion of set-valued mapping T, we introduce the notion of a T--......

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