Topological properties of tripled fixed points set of multifunctions

Abstract

In 1970, Schirmer provided some results abouttopological properties of the fixed points set of multifunctions.Later, some authors continued this review by providing differentconditions. In 2008, 2009 Sintamarian proved some results onabsolute retractivity of the common fixed points set of twomultivalued operators. In this paper we shall present some newresults on absolute retractivity of tripled fixed points set formultifunctions of the form $F:X\times X\times X\rightarrowP_{b,cl}(X)$.