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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Wed, 05 Dec 2001 03:07:44 +0100
changeset 12372
cd3a09c7dac9
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
tuned declarations;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);