subdiagonal

S1U1B3D2I1A1G2O1N1A1L1

adjective

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

Scrabble 15
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

adjectivesubdiagonal (not comparable)
  1. not comparablemathematicsSaid 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
nounsubdiagonal (plural subdiagonals)

plural subdiagonals

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

Origin

From sub- + diagonal.

Full word history & related roots →
Cite this entry
APA

subdiagonal. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/subdiagonal

MLA

“subdiagonal.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/subdiagonal. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “subdiagonal,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/subdiagonal.

Source: subdiagonal on Wiktionary, CC BY-SA 4.0.