src/HOL/Subst/Setplus.thy
author nipkow
Mon Oct 21 09:50:50 1996 +0200 (1996-10-21)
changeset 2115 9709f9188549
parent 1476 608483c2122a
permissions -rw-r--r--
Added trans_tac (see Provers/nat_transitive.ML)
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(*  Title:      Substitutions/setplus.thy
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    Author:     Martin Coen, Cambridge University Computer Laboratory
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    Copyright   1993  University of Cambridge
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Minor additions to HOL's set theory
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*)
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Setplus = Set + 
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rules
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  ssubset_def    "A < B == A <= B & ~ A=B"
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end