Examples and Questions in the Theory of Fixed Point Sets

Martin, John R. ; Jr., Sam B. Nadler

Canadian journal of mathematics, Tome 31 (1979) no. 5, pp. 1017-1032

Résumé

All spaces considered in this paper will be metric spaces. A subset A of a space X is called a fixed point set of X if there is a map (i.e., continuous function) ƒ: X → X such that ƒ(x) = x if and only if x ∈ A. In [22] L. E. Ward, Jr. defines a space X to have the complete invariance property (CIP) provided that each of the nonempty closed subsets of X is a fixed point set of X. The problem of determining fixed point sets of spaces has been investigated in [14] through [20] and [22]. Some spaces known to have CIP are n-cells[15], dendrites [20], convex subsets of Banach spaces [22], compact manifolds without boundary [16], and a class of polyhedra which includes all compact triangulable manifolds with or without boundary [18].

Détail

DOI : 10.4153/CJM-1979-094-5

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