Quincunx matrix

Short description: 2x2 matrix with 1 and -1 coefficients

In mathematics, the matrix

$\left(\begin{array}{cc}1& -1\\ 1& 1\end{array}\right)$

is sometimes called the quincunx matrix. It is a 2×2 Hadamard matrix, and its rows form the basis of a diagonal square lattice consisting of the integer points whose coordinates both have the same parity; this lattice is a two-dimensional analogue of the three-dimensional body-centered cubic lattice.

See also

• Quincunx