prefactorn.

Brit.

/ˈpriːfaktə/, U.S.

/ˈpriˌfæktər/

Origin: Formed within English, by derivation. Etymons: pre- prefix, factor n.

Etymology: < pre- prefix + factor n. Compare postfactor n. at post- prefix 1a(b)(ii)(2).

Mathematics.

The first of two factors in non-commutative multiplication.

ΚΠ

1884 J. W. Gibbs Elem. Vector Anal. §131 That is, the vector α × β as a pre- or post-factor in skew multiplication is equivalent to the dyadic {βα − αβ} taken as pre- or post-factor in direct multiplication.

1947 S. A. Stigant Mod. Electr. Engin. Math. vi. 117 In Eqn. (6.3), the dyadic is a prefactor to the vector B.

2004 K. Nakamura & T. Harayama Quantum Chaos & Quantum Dots ii. 12 The prefactor 2 is due to the spin degree of freedom of the electron.

This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).

单词	prefactor
释义	prefactorn. Brit. /ˈpriːfaktə/, U.S. /ˈpriˌfæktər/ Origin: Formed within English, by derivation. Etymons: pre- prefix, factor n. Etymology: < pre- prefix + factor n. Compare postfactor n. at post- prefix 1a(b)(ii)(2). Mathematics. The first of two factors in non-commutative multiplication. ΚΠ 1884 J. W. Gibbs Elem. Vector Anal. §131 That is, the vector α × β as a pre- or post-factor in skew multiplication is equivalent to the dyadic {βα − αβ} taken as pre- or post-factor in direct multiplication. 1947 S. A. Stigant Mod. Electr. Engin. Math. vi. 117 In Eqn. (6.3), the dyadic is a prefactor to the vector B. 2004 K. Nakamura & T. Harayama Quantum Chaos & Quantum Dots ii. 12 The prefactor 2 is due to the spin degree of freedom of the electron. This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022). < n.1884
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