"matrix" - key terms from Wikipedia

active matrix
adjacency matrix
alfa matrix
autobot matrix	of leadership
block matrix
covariance matrix
data matrix
density matrix
diagonal matrix
dot matrix
dot matrix	printers
enter the matrix
essential matrix
extracellular matrix
firestorm matrix
fundamental matrix
hadamard matrix
hermitian matrix
hessian matrix
identity matrix
incidence matrix
invertible matrix
jacobian matrix
matrix
matrix	elements
matrix	exponential
matrix	games
matrix	mechanics
matrix	multiplication
matrix	of leadership
matrix	online
matrix	reloaded
matrix	representation
matrix	revolutions
matrix	series
mitochondrial matrix
orthogonal matrix
payoff matrix
permutation matrix
rotation matrix
sparse matrix
square matrix
stiffness matrix
switch matrix
symmetric matrix
transformation matrix
triangular matrix
tridiagonal matrix
unitary matrix
upper triangular matrix