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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Thu, 30 Sep 1999 21:21:52 +0200
changeset 7665
1ab0c74cd748
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
get_goal: prop; fix_i: typ option;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);