multiplicative identity
(of clothing) That stretches more than usual
plural of play-by-mail
(mathematics, copulative) To be equal to, to have the same value as; to correspond to. / (transitive) To make equivalent to; to cause to match. / (informal) To have as its consequence.
(algebra) An element of an algebraic structure, generally denoted 1, which is an identity for a multiplicative operation (generally denoted × or *, or by concatenation).
行列代数では、乗法における単位元は、他の行列と掛け合わせても変化させない単位行列です。
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