FORALL_NOT_CONV : conv

SYNOPSIS
Moves a universal quantification inwards through a negation.

DESCRIBE
When applied to a term of the form !x.~P, the conversion FORALL_NOT_CONV returns the theorem:
   |- (!x.~P) = ~(?x. P)

FAILURE
Fails if applied to a term not of the form !x.~P.

SEEALSO  EXISTS_NOT_CONV,   NOT_EXISTS_CONV,   NOT_FORALL_CONV

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