crossratio

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A form of cross-ratio — A special number associated with an ordered quadruple of collinear points, particularly points on a projective line, and preserved by the fractional linear transformations.

Scrabble 12
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Meanings

nouncrossratio (plural crossratios)

plural crossratios

  1. alternativeAlternative form of cross-ratio.

    The Schwarzian measures how f changes the crossratio of infinitesimally close points.

    2009 January, Notices of the American Mathematical Society, volume 56, number 1, archived from the original on 25 Jan 2009
Cite this entry
APA

crossratio. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/crossratio

MLA

“crossratio.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/crossratio. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “crossratio,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/crossratio.

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