Fuzzy Retractions of Fuzzy Open Flat Robertson-Walker Space

摘要

Our aim in the present paper is to introduce and study new types of fuzzy retractions of fuzzy open flat Robertson-WalkerW~4model. New types of the fuzzy deformation retracts ofW~4model are obtained. The relations between the fuzzy foldings and the fuzzy deformation retracts ofW~4model are deduced. Types of fuzzy minimal retractions are also presented. New types of homotopy maps are deduced. New types of conditional fuzzy folding are presented. Some commutative diagrams are obtained.