"matrices" - key terms from Wikipedia

all matrices
covariance matrices
density matrices
diagonal matrices
diagonalizable matrices
dirac matrices
finite rotation matrices
hermitian matrices
infinite matrices
infinitesimal rotation matrices
invertible matrices
jones matrices
lesser matrices
lower triangular matrices
matrices
matrices	a and b
matrices	of determinant
matrices	over
matrices	whose entries
matrices	with entries
matrices	with infinitely many rows
monomial matrices
new tools and matrices
orthogonal matrices
pauli matrices
permutation matrices
quantization matrices
quotient matrices
rotation matrices
singular matrices
sparse matrices
square matrices
symmetric matrices
these matrices
transformation matrices
triangular matrices
two matrices
two upper triangular matrices
unitary matrices
upper triangular matrices
uses matrices