Definition that contains square matrix
- diagonal (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry
- determinant a square matrix used to solve simultaneous equations
- eigenvalue (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant
- main diagonal the diagonal of a square matrix running from the upper left entry to the lower right entry
- principal diagonal the diagonal of a square matrix running from the upper left entry to the lower right entry
- diagonal matrix a square matrix with all elements not on the main diagonal equal to zero
- eigenvalue of a square matrix (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant
- matrix transposition the interchange of each row of a square matrix with the corresponding column
- secondary diagonal the diagonal of a square matrix running from the lower left entry to the upper right entry
- diagonalisation changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal)