Logical matrix

A logical matrix or (0,1) matrix is a matrix with entries from the "Boolean domain", $B = \{0, 1\}$.

$$\begin{array}{cc}& \begin{array}{cc}1& 2\end{array}\\ \begin{array}{c}1\\ 2\end{array}& \left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right]\end{array}$$