"matrix" - key terms from Wikipedia

adjacency matrix
autobot matrix	of leadership
bcg matrix
characters in the matrix	series
coherency matrix
covariance matrix
crystal matrix	table
dead matrix
density matrix
diagonal matrix
dot matrix
dot matrix	printers
enter the matrix
extracellular matrix
hermitian matrix
hessian matrix
identity matrix
invertible matrix
jacobian matrix
lower triangular matrix
machines in the matrix	series
matrix
matrix	character
matrix	material
matrix	mechanics
matrix	multiplication
matrix	norm
matrix	of leadership
matrix	online
matrix	product
matrix	reloaded
matrix	revolutions
matrix	series
matrix	tables
minor characters in the matrix
mitochondrial matrix
orthogonal matrix
payoff matrix
quantization matrix
real matrix
rotation matrix
ships in the matrix	series
sparse matrix
square matrix
symmetric matrix
toyota matrix
transformation matrix
triangular matrix
unitary matrix
upper triangular matrix