To enter a matrix having multiple elements, use braces ({ }) to enclose the data values and, if needed, commas to separate rows. Inside of the braces, all elements must be either numeric or character.

The AND logical operator (&) compares two matrices, element by element, to produce a new matrix. An element of the new matrix is 1 if the corresponding elements of matrix1 and matrix2 are both nonzero ...

Transactions of the American Mathematical Society, Vol. 42, No. 1 (Jul., 1937), pp. 16-31 (16 pages) ...