src/HOL/IMP/Natural.thy
Wed, 06 May 1998 11:46:00 +0200 nipkow Changed [/] to [:=] and removed actual definition.
Thu, 06 Jun 1996 14:39:44 +0200 paulson Quotes now optional around inductive set
Mon, 29 Apr 1996 15:48:27 +0200 nipkow Natural and Transition semantics.
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