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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Thu, 07 Dec 2000 22:27:57 +0100
changeset 10633
85c5645a8a93
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Id;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);