Name for a non-square matrix with ones along the main diagonal? [closed] Matthew Miller | June 07, 2026 $\begingroup$ Is there a name for a matrix that would be the identity matrix, except that it's not square? In other words, it has ones along the main diagonal, and zeroes off of the main diagonal. But as it's not a square matrix, it is not the identity matrix. $\endgroup$ 4 Sorted by: Reset to default