doc-src/Tutorial/ToyList/lemma3
author kleing
Sun, 18 May 2003 15:28:41 +0200
changeset 14035 c46ce87960fb
parent 5377 efb799c5ed3c
permissions -rw-r--r--
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Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);