src/HOLCF/ex/Fix2.thy
author oheimb
Mon, 16 Dec 1996 13:10:02 +0100
changeset 2420 cb21eef65704
parent 1479 21eb5e156d91
child 2570 24d7e8fb8261
permissions -rw-r--r--
corrected 8bit symbols

(*  Title:      HOLCF/ex/Fix2.thy
    ID:         $Id$
    Author:     Franz Regensburger
    Copyright   1995 Technische Universitaet Muenchen

 Show that fix is the unique least fixed-point operator. 
 From axioms gix1_def,gix2_def it follows that fix = gix

*)

Fix2 = Fix + 

consts

     gix     :: "('a->'a)->'a"

rules

gix1_def "F`(gix`F) = gix`F"
gix2_def "F`y=y ==> gix`F << y"

end