Category
page 1Sparse matrices

identity matrix
square matrix with ones on the main diagonal and zeros elsewhere
diagonal matrix
matrix whose only nonzero elements are on its main diagonal
zero matrix
matrix whose entries are all 0
permutation matrix
matrices representing permutation of vector elements; with exactly one 1 per row and column
sparse matrix
matrix in which most of the elements are zero
block matrix
matrix defined using smaller matrices called blocks
tridiagonal matrix
square matrix that has nonzero elements on the main diagonal, the first diagonal below this, and the first diagonal above the main diagonal only
band matrix
matrix with non-zero elements only in a diagonal band
anti-diagonal matrix
a square matrix where all the entries are zero except those on the diagonal going from the lower left corner to the upper right corner
matrix unit
matrix where a single element is one and the rest of the elements are zeroes
Cuthill–McKee algorithm
algorithm
shift matrix
bidiagonal matrix
shear matrix
elementary matrix representing a row-addition transformation
generalized permutation matrix
Matrix with exactly one nonzero entry in each row and each column