In
mathematics, the
matrix
Matrix most commonly refers to:
* ''The Matrix'' (franchise), an American media franchise
** ''The Matrix'', a 1999 science-fiction action film
** "The Matrix", a fictional setting, a virtual reality environment, within ''The Matrix'' (franchis ...
:
is sometimes called the quincunx matrix. It is a 2×2
Hadamard matrix
In mathematics, a Hadamard matrix, named after the French mathematician Jacques Hadamard, is a square matrix whose entries are either +1 or −1 and whose rows are mutually orthogonal. In geometric terms, this means that each pair of rows ...
, 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
A quincunx () is a geometric pattern consisting of five points arranged in a cross, with four of them forming a square or rectangle and a fifth at its center. The same pattern has other names, including "in saltire" or "in cross" in heraldry (d ...
Notes
Matrices
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