negation of a Boolean value is the opposite value, given by
A | -A
--+---
T | F
F | T
-A is also written as A with a bar over it or with a small
vertical line hanging from the right-hand end of the "-"
(
LaTeX neg) or as A'. In the
C programming language, it
is !A and in digital circuit design, /A.
(1995-01-24)