doc-src/Tutorial/ToyList/lemma3
author wenzelm
Mon, 22 May 2000 10:31:44 +0200
changeset 8906 fc7841f31388
parent 5377 efb799c5ed3c
permissions -rw-r--r--
tuned;
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Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
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by(induct_tac "xs" 1);
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by(Auto_tac);