author | wenzelm |
Sat, 03 Nov 2001 18:41:28 +0100 | |
changeset 12036 | 49f6c49454c2 |
parent 10835 | f4745d77e620 |
child 14981 | e73f8140af78 |
permissions | -rw-r--r-- |
(* Title: HOLCF/ex/Fix2.thy ID: $Id$ Author: Franz Regensburger License: GPL (GNU GENERAL PUBLIC LICENSE) 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