Vol. 45, No. 1, 1973

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Fixed points in partially ordered sets

Raymond Earl Smithson

Vol. 45 (1973), No. 1, 363–367
Abstract

In the first section of this paper a converse of a fixed point theorem for increasing functions on partially ordered sets is obtained. In the second part of the paper some results on common fixed points for commuting families of functions are extended to multifunctions and some known results are obtained as corollaries.

Mathematical Subject Classification 2000
Primary: 06A10
Secondary: 54H25
Milestones
Received: 18 November 1971
Revised: 7 April 1972
Published: 1 March 1973
Authors
Raymond Earl Smithson