src/FOL/FOL_lemmas2.ML
author wenzelm
Thu, 30 Nov 2000 20:05:34 +0100
changeset 10551 ec9fab41b3a0
parent 9264 051592f4236a
permissions -rw-r--r--
renamed "equivalence_class" to "class";


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