Negation, NOT Gate

Definition¹

A Boolean function like the following is called a $\text{NOT}$ gate or logical negation and is denoted as follows.

$$ \lnot : \left\{ 0, 1 \right\} \to \left\{ 0, 1 \right\} $$

$$ \lnot 0 = 1,\quad \lnot 1 = 0 $$

Description

The $\text{NOT}$ gate returns the opposite of the input.

부울 함수	기호	진리표
$\text{NOT}$		$a$ $\lnot a$ $0$ $1$ $1$ $0$