Fixed Point Theory and Applications 
Volume 2005 (2005), Issue 3, Pages 307-320
doi:10.1155/FPTA.2005.307

Fixed point results and their applications to Markov processes

S. Heikkilä

 Department of Mathematical Sciences, University of Oulu, P.O. Box 3000, Oulu 90014, Finland
Received 2 December 2004; Revised 8 March 2005

Abstract

New existence and comparison results are proved for fixed points of increasing operators and for common fixed points of operator families in partially ordered sets. These results are then applied to derive existence and comparison results for invariant measures of Markov processes in a partially ordered Polish space.