Şahan, Tunçar13.07.20192019-07-1613.07.20192019-07-1620181976-86052288-1433https://doi.org/10.11568/kjm.2018.26.3.439https://hdl.handle.net/20.500.12451/3777In this study, we interpret the notion of homotopy of morphisms in the category of crossed modules in a category C of groups with operations using the categorical equivalence between the categories of crossed modules and of internal categories in C. Further, we characterize the derivations of crossed modules in a category C and obtain new crossed modules using regular derivations of old one.eninfo:eu-repo/semantics/openAccessHomotopyCrossed ModuleInternal CategoryGroup with OperationsArticle26343945810.11568/kjm.2018.26.3.439WOS:000445962200006N/A