PEXISTS_NOT_CONV : conv
STRUCTURE
LIBRARY
pair
SYNOPSIS
Moves a paired existential quantification inwards through a negation.
DESCRIPTION
When applied to a term of the form ?p. ~t, the conversion PEXISTS_NOT_CONV returns the theorem:
   |- (?p. ~t) = ~(!p. t)

FAILURE
Fails if applied to a term not of the form ?p. ~t.
SEEALSO
HOL  Kananaskis-14