Nearness gamma semigroups

this study which is designed as a graduate thesis consist of two chapters. In the first chapter, some basic concepts such as rough sets, near sets, fundamental approximation spaces, nearness approximation spaces and their proporties, nearness gamma semigroups were given for the rest of the thesis to be understood better. ın the second chapter, gamma semigroups were introduced and examples were given taking into consideration upper approximation in nearness approximation spaces. In the seceond section of this chapter, concept of complete indiscernibility relation and some properties of lower and upper approximations on nearness approximation spaces were given.