LEFT_OR_EXISTS_CONV
Conv.LEFT_OR_EXISTS_CONV : conv
Moves an existential quantification of the left disjunct outwards through a disjunction.
When applied to a term of the form (?x.P) \/ Q, the conversion
LEFT_OR_EXISTS_CONV returns the theorem:
|- (?x.P) \/ Q = (?x'. P[x'/x] \/ Q)
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 (?x.P) \/ Q.
See also
Conv.EXISTS_OR_CONV,
Conv.OR_EXISTS_CONV,
Conv.RIGHT_OR_EXISTS_CONV