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doc-src/Tutorial/Misc/constdefs
author wenzelm
Thu, 24 Jan 2002 22:42:14 +0100
changeset 12847 afa356dbcb15
parent 5377 efb799c5ed3c
permissions -rw-r--r--
fixed subgoal_tac; fails on non-existent subgoal;

constdefs nand :: gate
         "nand A B == ~(A & B)"
          exor :: gate
         "exor A B == A & ~B | ~A & B"
isabelle