subdiagonal
nounEtymology From sub- + diagonal.
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Mathematics, Sciences The diagonal of a matrix that lies directly below and to the left of the main diagonal.
subdiagonal
adjEtymology From sub- + diagonal.
1
Mathematics, Sciences Said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix.
- (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:2010, Martin Aigner with Günter M. Ziegler, chapter 16, in Proofs from THE BOOK, 4th edition, Delhi, India: Springer (India), published 2013, page 97: