PEXISTS_NOT_CONV
PairRules.PEXISTS_NOT_CONV : conv
Moves a paired existential quantification inwards through a negation.
When applied to a term of the form ?p. ~t, the conversion
PEXISTS_NOT_CONV returns the theorem:
|- (?p. ~t) = ~(!p. t)
Failure
Fails if applied to a term not of the form ?p. ~t.
See also
Conv.EXISTS_NOT_CONV,
PairRules.PFORALL_NOT_CONV,
PairRules.NOT_PEXISTS_CONV,
PairRules.NOT_PFORALL_CONV