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doc-src/Tutorial/Misc/NatSum.ML
author
obua
Sun, 09 May 2004 23:04:36 +0200
changeset 14722
8e739a6eaf11
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
replaced apply-style proof for instance Multiset :: plus_ac0 by recommended Isar proof style
Goal "sum n + sum n = n*(Suc n)";
by(induct_tac "n" 1);
by(Auto_tac);