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doc-src/Tutorial/ToyList/lemma3
author
nipkow
Tue, 13 Aug 2002 21:54:23 +0200
changeset 13497
defb74f6a5bc
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
*** empty log message ***
Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);