superdiagonal

S1U1P3E1R1D2I1A1G2O1N1A1L1

noun

The diagonal of a matrix that lies directly above and to the right of the main diagonal.

Scrabble 17
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounsuperdiagonal (plural superdiagonals)

plural superdiagonals

  1. mathematicsThe diagonal of a matrix that lies directly above and to the right of the main diagonal.

    We classify all free spectrahedra that are circular, that is, closed under multiplication by exp(i t): up to unitary equivalence, the coefficients of a minimal LMI defining a circular free spectrahedron have a common block decomposition in which the only nonzero blocks are on the superdiagonal.

    2016, Eric Evert, J. William Helton, Igor Klep, Scott McCullough, “Circular Free Spectrahedra”, in arXiv

Origin

From super- + diagonal.

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

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