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反変性 (hanpensei) Japanese meaning: contravariance | Kotomora
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む
き
を
逆ぎゃく
に
する
性せい
質しつ
を
指さ
す
。
Contravariance refers to the property of a functor that reverses the direction of morphisms.
Kanji 変 unusual, change, strange Related words 共きょう 変へん 性せい 共変性 (covariance) is the opposite concept, where a functor preserves the direction of morphisms.
反はん 変ぺん 反変 is a shorter form often used as a prefix or in compounds, while 反変性 explicitly nominalizes the property.
Etymology Compound of 反 (counter-, anti-) + 変 (change, transformation) + 性 (-ness, property). The term is a direct translation of the English mathematical term 'contravariance'.
