is_neg : term -> bool
STRUCTURE
boolSyntax
SYNOPSIS
Tests a term to see if it is a negation.
DESCRIPTION
If
M
has the form
~t
, then
is_neg M
returns
true
. If the term is not a negation the result is
false
.
FAILURE
Never fails.
SEEALSO
mk_neg
,
dest_neg
HOL
Kananaskis-13