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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Sat, 01 Sep 2001 00:20:22 +0200
changeset 11545
0b56d9c90dcf
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
final proofs := 0;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);