Word.ws English Dictionary

subdiagonal

subdiagonal 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.

Adjective

subdiagonal (not comparable)

  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.
    • (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

Noun

subdiagonal (plural subdiagonals)

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

Forms of subdiagonal

pluralsubdiagonals

Origin of subdiagonal

From sub- + diagonal.

Questions about subdiagonal

What does subdiagonal mean?
Subdiagonal means said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix.
What part of speech is subdiagonal?
Subdiagonal can be an adjective or a noun.

Words near subdiagonal in the dictionary

  1. subdiaconate
  2. subdiaconates
  3. subdiagnoses
  4. subdiagnosis
  5. subdiagnostic
  6. subdiagonal
  7. subdiagonals
  8. subdiagram
  9. subdiagrams
  10. subdial
  11. subdialect

Source and license

Adapted from Wiktionary: subdiagonal (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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