subdiagonal
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English
[edit]Etymology
[edit]Adjective
[edit]subdiagonal (not comparable)
- (mathematics) Said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix.
- 2010, Martin Aigner with Günter M. Ziegler, chapter 16, in Proofs from THE BOOK, 4th edition, Delhi, India: Springer (India), published 2013, page 97:
- (3) From R, we obtain the set of points whose coordinates are the subdiagonal entries of the corresponding matrices:
.
Noun
[edit]subdiagonal (plural subdiagonals)
- (mathematics) The diagonal of a matrix that lies directly below and to the left of the main diagonal.