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src/FOL/ex/if.thy
author wenzelm
Thu, 24 Jan 2002 22:42:14 +0100
changeset 12847 afa356dbcb15
parent 0 a5a9c433f639
permissions -rw-r--r--
fixed subgoal_tac; fails on non-existent subgoal;

If = FOL +
consts  if     :: "[o,o,o]=>o"
rules
        if_def "if(P,Q,R) == P&Q | ~P&R"
end
isabelle