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doc-src/Tutorial/ToyList/lemma1
author
paulson
Fri, 02 Mar 2001 13:14:37 +0100
changeset 11188
5d539f1682c3
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
streamlined a proof
Goal "rev(xs @ ys) = (rev ys) @ (rev xs)";