--- a/Subst/Subst.thy Tue Oct 24 14:59:17 1995 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,37 +0,0 @@
-(* Title: Substitutions/subst.thy
- Author: Martin Coen, Cambridge University Computer Laboratory
- Copyright 1993 University of Cambridge
-
-Substitutions on uterms
-*)
-
-Subst = Setplus + AList + UTLemmas +
-
-consts
-
- "=s=" :: "[('a*('a uterm)) list,('a*('a uterm)) list] => bool" (infixr 52)
-
- "<|" :: "['a uterm,('a*('a uterm)) list] => 'a uterm" (infixl 55)
- "<>" :: "[('a*('a uterm)) list, ('a*('a uterm)) list] =>
- ('a*('a uterm)) list" (infixl 56)
- sdom :: "('a*('a uterm)) list => 'a set"
- srange :: "('a*('a uterm)) list => 'a set"
-
-rules
-
- subst_eq_def "r =s= s == ALL t.t <| r = t <| s"
-
- subst_def
- "t <| al == uterm_rec(t, %x.assoc(x,Var(x),al),
- %x.Const(x),
- %u v q r.Comb(q,r))"
-
- comp_def "al <> bl == alist_rec(al,bl,%x y xs g.<x,y <| bl>#g)"
-
- sdom_def
- "sdom(al) == alist_rec(al, {},
- %x y xs g.if(Var(x)=y, g Int Compl({x}), g Un {x}))"
- srange_def
- "srange(al) == Union({y. EX x:sdom(al).y=vars_of(Var(x) <| al)})"
-
-end