src/FOL/FOL.thy
author wenzelm
Wed, 15 Oct 1997 15:12:59 +0200
changeset 3872 a5839ecee7b8
parent 0 a5a9c433f639
child 4093 5e8f3d57dee7
permissions -rw-r--r--
tuned; prepare ext;
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FOL = IFOL +
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rules
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classical "(~P ==> P) ==> P"
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end