Components and Unions of Components
Yatsuka Nakamura, Andrzej Trybulec · 1996
Summary. First, we generalized skl function for a subset of topological spaces the value of which is the component including the set. Second, we introduced a concept of union of components a family of which has good algebraic properties. At the end, we discuss relationship between connectivity of a set as a subset in the whole space and as a subset of a subspace.