subdiagonal — English Dictionary

Adjective

1. Said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix.

   Usage

   • not-comparable

   Examples

   More examples (1)

   (3) From R, we obtain the set of points #92;mathbb#123;R#125;#92;tbinom#123;n#125;#123;2#125; whose coordinates are the subdiagonal entries of the corresponding matrices:

Noun

1. The diagonal of a matrix that lies directly below and to the left of the main diagonal.