doc-src/Tutorial/Misc/Exor.thy
author wenzelm
Thu, 01 Jul 1999 17:41:16 +0200
changeset 6872 b250da153b1e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
fixed backtracking of global_qed;

Exor = Main +
constdefs
 exor :: bool => bool => bool
"exor A B == (A & ~B) | (~A & B)"
end