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src/FOL/FOL_lemmas2.ML
author
wenzelm
Thu, 24 Jan 2002 22:42:14 +0100
changeset 12847
afa356dbcb15
parent 9264
051592f4236a
permissions
-rw-r--r--
fixed subgoal_tac; fails on non-existent subgoal;
Goal "[| EX! z. P(a,z); P(a,b); P(a,c) |] ==> b = c";
by (Blast_tac 1);
qed "ex1_functional";