Damghan University Press Analytical and Numerical Solutions for Nonlinear Equations 3060-785X 7 1 2022 11 01 Some Results on c-Covers of A Pair of Groups 1 9 233 10.22128/gadm.2022.430.1047 EN Homayoon Arabyani Department of Mathematics, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran. Journal Article 2021 06 21 Let G be a group and N be a normal subgroup of G. In this paper, we provide some results on c-covers of a pair of groups. Moreover, we prove that every c-perfect pair of groups (G, N) admits at least one c-cover and also we show that a c-cover of a pair of finite groups has a unique domain up to isomorphism under some assumptions.  Pair of groups Covering pair Isoclinism of pair of groups https://ansne.du.ac.ir/article_233_dac6b25e8100ae2b59c08fe4ad1d2808.pdf