RIGHT_IMP_EXISTS_CONV
Conv.RIGHT_IMP_EXISTS_CONV : conv
Moves an existential quantification of the consequent outwards through an implication.
When applied to a term of the form P ==> (?x.Q), the conversion
RIGHT_IMP_EXISTS_CONV returns the theorem:
|- P ==> (?x.Q) = (?x'. P ==> (Q[x'/x]))
where x' is a primed variant of x that does not appear free in the
input term.
Failure
Fails if applied to a term not of the form P ==> (?x.Q).