EXISTS_NOT_CONV : conv
- SYNOPSIS
-
Moves an existential quantification inwards through a negation.
- DESCRIBE
-
When applied to a term of the form ?x.~P, the conversion EXISTS_NOT_CONV
returns the theorem:
|- (?x.~P) = ~(!x. P)
- FAILURE
-
Fails if applied to a term not of the form ?x.~P.
- SEEALSO FORALL_NOT_CONV,
NOT_EXISTS_CONV,
NOT_FORALL_CONV
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