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doc-src/Tutorial/ToyList/lemma3
author
ballarin
Fri, 29 Aug 2003 15:40:11 +0200
changeset 14175
dbd16ebaf907
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Method rule_tac understands Isar contexts: documentation.
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);