src/FOLP/FOLP.thy
author paulson
Mon Apr 26 13:25:49 1999 +0200 (1999-04-26)
changeset 6509 9f7f4fd05b1f
parent 3836 f1a1817659e6
child 17480 fd19f77dcf60
permissions -rw-r--r--
fixed a bug many years old in rule plusEC
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(*  Title:      FOLP/FOLP.thy
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    ID:         $Id$
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    Author:     Martin D Coen, Cambridge University Computer Laboratory
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    Copyright   1992  University of Cambridge
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Classical First-Order Logic with Proofs
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*)
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FOLP = IFOLP +
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consts
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  cla :: "[p=>p]=>p"
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rules
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  classical "(!!x. x:~P ==> f(x):P) ==> cla(f):P"
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end