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src/FOL/FOL_lemmas2.ML
author wenzelm
Fri, 02 Aug 2002 11:49:55 +0200
changeset 13443 1c3327c348b3
parent 9264 051592f4236a
permissions -rw-r--r--
typedef: "open" option;


Goal "[| EX! z. P(a,z);  P(a,b);  P(a,c) |] ==> b = c";
  by (Blast_tac 1);
qed "ex1_functional";
isabelle