principal diagonal

(redirected from principal diagonals)
Also found in: Dictionary, Thesaurus.

principal diagonal

[′prin·sə·pəl dī′ag·ən·əl]
(mathematics)
For a square matrix, the diagonal extending from the upper left-hand corner to the lower right-hand corner of the matrix, that is, the diagonal containing the elements aij for which i = j. Also known as main diagonal.
Full browser ?