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doc-src/Tutorial/ToyList/lemma3
author
mehta
Mon, 17 May 2004 11:02:16 +0200
changeset 14752
3fc3c7b7e99d
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
lemma disjoint_int_union removed - too special
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);