--- a/src/HOL/Relation.thy Tue Jan 09 15:18:07 2001 +0100
+++ b/src/HOL/Relation.thy Tue Jan 09 15:22:13 2001 +0100
@@ -16,8 +16,8 @@
comp :: "[('b * 'c)set, ('a * 'b)set] => ('a * 'c)set" (infixr "O" 60)
"r O s == {(x,z). ? y. (x,y):s & (y,z):r}"
- Image :: "[('a*'b) set,'a set] => 'b set" (infixl "```" 90)
- "r ``` s == {y. ? x:s. (x,y):r}"
+ Image :: "[('a*'b) set,'a set] => 'b set" (infixl "``" 90)
+ "r `` s == {y. ? x:s. (x,y):r}"
Id :: "('a * 'a)set" (*the identity relation*)
"Id == {p. ? x. p = (x,x)}"