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doc-src/Tutorial/ToyList/lemma3
author
wenzelm
Sun, 23 Jul 2000 12:01:05 +0200
changeset 9408
d3d56e1d2ec1
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
classical atts now intro! / intro / intro?;
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);