† evectorn.

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin ēvect- , ēvehere , -or suffix.

Etymology: < classical Latin ēvect-, past participial stem of ēvehere (see evect v.) + -or suffix. Compare evectant n.

Mathematics. Obsolete. rare.

In or with reference to the writings of J. J. Sylvester: a differential operator which produces a contravariant, called an evectant, of a homogeneous polynomial when applied to one of the invariants of that polynomial. Frequently attributive.The evector is formed by replacing each coefficient a in the polynomial with a differential operator ^d/ _da.

ΚΠ

1852 J. J. Sylvester in Cambr. & Dubl. Math. Jrnl. 7 215 The comparatively simple but eminently important theory of the evector symbol does however admit of a very pretty verification by aid of these equations.

1854 Cambr. & Dublin Math. Jrnl. 9 95 The operative form above written is termed the evector.

1871 Q. Jrnl. Pure & Appl. Math. 11 42 Indicating the evector operator by ∇, and (according to Professor Sylvester's nomenclature) the devector operator..by ∆, we find, if C is the m^th evectant of I..[etc.].

This entry has been updated (OED Third Edition, March 2018; most recently modified version published online September 2018).

单词	evector
释义	† evectorn. Origin: A borrowing from Latin, combined with an English element. Etymons: Latin ēvect- , ēvehere , -or suffix. Etymology: < classical Latin ēvect-, past participial stem of ēvehere (see evect v.) + -or suffix. Compare evectant n. Mathematics. Obsolete. rare. In or with reference to the writings of J. J. Sylvester: a differential operator which produces a contravariant, called an evectant, of a homogeneous polynomial when applied to one of the invariants of that polynomial. Frequently attributive.The evector is formed by replacing each coefficient a in the polynomial with a differential operator ^d/ _da. ΚΠ 1852 J. J. Sylvester in Cambr. & Dubl. Math. Jrnl. 7 215 The comparatively simple but eminently important theory of the evector symbol does however admit of a very pretty verification by aid of these equations. 1854 Cambr. & Dublin Math. Jrnl. 9 95 The operative form above written is termed the evector. 1871 Q. Jrnl. Pure & Appl. Math. 11 42 Indicating the evector operator by ∇, and (according to Professor Sylvester's nomenclature) the devector operator..by ∆, we find, if C is the m^th evectant of I..[etc.]. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online September 2018). < n.1852
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