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doc-src/Tutorial/Misc/Exor.thy
author wenzelm
Thu, 04 Oct 2001 15:20:40 +0200
changeset 11670 59f79df42d1f
parent 5377 efb799c5ed3c
permissions -rw-r--r--
proof by cases and induction on types and sets (used to be specific for HOL);

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