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doc-src/Tutorial/ToyList/lemma3
author paulson
Fri, 15 Aug 2003 13:07:01 +0200
changeset 14150 9a23e4eb5eb3
parent 5377 efb799c5ed3c
permissions -rw-r--r--
A document for UNITY
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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);
isabelle