LEFT_OR_PEXISTS_CONV
PairRules.LEFT_OR_PEXISTS_CONV : conv
Moves a paired existential quantification of the left disjunct outwards through a disjunction.
When applied to a term of the form (?p. t) \/ u, the conversion
LEFT_OR_PEXISTS_CONV returns the theorem:
|- (?p. t) \/ u = (?p'. t[p'/p] \/ u)
where p' is a primed variant of the pair p that does not contain any
variables free in the input term.
Failure
Fails if applied to a term not of the form (?p. t) \/ u.
See also
Conv.LEFT_OR_EXISTS_CONV,
PairRules.PEXISTS_OR_CONV,
PairRules.OR_PEXISTS_CONV,
PairRules.RIGHT_OR_PEXISTS_CONV