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src/HOL/Inductive.thy
author paulson
Wed, 23 Jul 1997 11:52:22 +0200
changeset 3564 f886dbd91ee5
parent 1862 74d4ae2f6fc3
child 5102 8c782c25a11e
permissions -rw-r--r--
Now Datatype.occs_in_prems prints the necessary warning ITSELF. It is also easier to invoke and even works if the induction variable is a parameter (rather than a free variable).

Inductive = Gfp + Prod + Sum + "indrule"
isabelle