ex/pl0.ML
author lcp
Thu, 13 Oct 1994 09:39:15 +0100
changeset 153 c0ff8f1ebc16
parent 56 385d51d74f71
permissions -rw-r--r--
HOL/HOL.ML/selectI2: new rule for descriptions
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(*  Title: 	HOL/ex/pl0.ML
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    ID:         $Id$
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    Author: 	Tobias Nipkow
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    Copyright   1994  TU Muenchen
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Inductive definition of propositional logic formulae.
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*)
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structure PL0 = DeclaredDatatype
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(val base = PL0.thy
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 val data = "'a pl = false | var('a) | \"op->\"('a pl,'a pl)"
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);