Roughness in Subtraction Semigroups
T. Anitha, D. Krishnaswamy · 2011
This paper introduces the notion of rough ideal with respect to an ideal of a subtraction semigroup which is an extended notion of an ideal in a subtraction semigroup, and it give Some properties of the lower and the upper approximations in a subtraction semigroup. Mathematics Subject Classifications: 03G25, 06F35, 06B10, 06D99