NOT_EXISTS_CONV : conv
- SYNOPSIS
-
Moves negation inwards through an existential quantification.
- DESCRIBE
-
When applied to a term of the form ~(?x.P), the conversion
NOT_EXISTS_CONV returns the theorem:
|- ~(?x.P) = !x.~P
- FAILURE
-
Fails if applied to a term not of the form ~(?x.P).
- SEEALSO EXISTS_NOT_CONV,
FORALL_NOT_CONV,
NOT_FORALL_CONV
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