Joint continuity of K h C-functions with values in moore spaces

Abstract

We introduce the notion of categorical cliquish mapping and show that, for each K h C-mapping f: X × Y → Z, where X is a topological space, Y is a space with the first axiom of countability, and Z is a Moore space, with categorical-cliquish horizontal y-sections f y , the sets C y (f) are residual G δ-type sets in X for every y ∈ Y.