PEXISTS_NOT_CONV : conv
STRUCTURE
PairRules
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
EXISTS_NOT_CONV
,
PFORALL_NOT_CONV
,
NOT_PEXISTS_CONV
,
NOT_PFORALL_CONV
HOL
Kananaskis-10