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Dictionary

Words, grammatical forms and meanings linked to the ontology.

cross-ratio en · NOUN

Etymology

From cross- + ratio.

Meanings

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

Forms

SpellingFeaturesLabelsSource
cross-ratios Number=Plur lexicographic
crossratio alternative lexicographic

Synonyms

double ratio · anharmonic ratio

Translations (1)

fr birapport (a special number associated with an ordered quadruple of collinear points, particularly points on a projective line, and preserved by the fractional linear transformations)