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单词 Roots of unity
释义

Roots of unity

中文百科

单位根 Root of unity

(重定向自Roots of unity)
复平面上的三次单位根
Las 5 soluciones de la raíz quinta de la unidad en el plano complejo
Plot of z3 − 1, in which a zero is represented by the color black.
Plot of z5 − 1, in which a zero is represented by the color black.

数学上,n \,次单位根n\,次幂为1的复数。它们位于复平面的单位圆上,构成正n边形的顶点,其中一个顶点是1。

z^n = 1 \qquad (n = 1, 2, 3, \cdots  )

这方程的复数根 z \,n \,次单位根

单位的 n \,次根有 n \,个:

e^{\frac{2 \pi k {\mathrm{i}} }{n} } \qquad (k = 0, 1, 2, \cdots, n - 1)
英语百科

Root of unity 单位根

(重定向自Roots of unity)
The 5th roots of unity in the complex plane
The 3rd roots of unity
Plot of z3 − 1, in which a zero is represented by the color black.
Plot of z5 − 1, in which a zero is represented by the color black.

In mathematics, a root of unity, occasionally called a de Moivre number, is any complex number that gives 1 when raised to some positive integer power n. Roots of unity are used in many branches of mathematics, and are especially important in number theory, the theory of group characters, and the discrete Fourier transform.

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更新时间:2025/6/16 16:52:24