چكيده فارسي :
Orthogonal metric spaces has been initiated recently by Eshaghi and et. [M. Eshaghi, M.
Ramezani, M.D.L. Sen, Y.J. Cho, On orthogonal sets and Banach’s fixed point theorem, accepted
in Fixed point theory]. In this present paper, the concept of contraction for set-valued maps in
orthogonal metric space is introduced. Our results are real generalization of Nadler , Mizoguchi-
.Takahashi and Ciric
