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单词 Tchebyscheff polynomials
释义

Tchebyscheff polynomials

中文百科

切比雪夫多项式 Chebyshev polynomials

(重定向自Tchebyscheff polynomials)
切比雪夫多项式

切比雪夫多项式是与棣莫弗定理有关,以递归方式定义的一系列正交多项式串行。 通常,第一类切比雪夫多项式以符号Tn表示, 第二类切比雪夫多项式用Un表示。切比雪夫多项式 TnUn 代表 n 阶多项式。

切比雪夫多项式在逼近理论中有重要的应用。这是因为第一类切比雪夫多项式的根(被称为切比雪夫节点)可以用于多项式插值。相应的插值多项式能最大限度地降低龙格现象,并且提供多项式在连续函数的最佳一致逼近。

在微分方程的研究中,切比雪夫提出切比雪夫微分方程

相应地,第一类和第二类切比雪夫多项式分别为这两个方程的解。 这些方程是斯图姆-刘维尔微分方程的特殊情形.

英语百科

Chebyshev polynomials 切比雪夫多项式

(重定向自Tchebyscheff polynomials)
The first few Chebyshev polynomials of the first kind in the domain −1 < x < 1:
The flat T0, T1, T2, T3, T4 and T5.
The first few Chebyshev polynomials of the second kind in the domain −1 < x < 1: The flat U0, U1, U2, U3, U4 and U5.
Although not visible in the image, Un(1) = n + 1 and Un(−1) = (n + 1)(−1)n.
The non-smooth function (top) y = −x3H(−x), where H is the Heaviside step function, and (bottom) the 5th partial sum of its Chebyshev expansion. The 7th sum is indistinguishable from the original function at the resolution of the graph.
polinomios de Chebyshov de primer tipo Tn

In mathematics the Chebyshev polynomials, named after Pafnuty Chebyshev, are a sequence of orthogonal polynomials which are related to de Moivre's formula and which can be defined recursively. One usually distinguishes between Chebyshev polynomials of the first kind which are denoted Tn and Chebyshev polynomials of the second kind which are denoted Un. The letter T is used because of the alternative transliterations of the name Chebyshev as Tchebycheff, Tchebyshev (French) or Tschebyschow (German).

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更新时间:2025/6/17 15:13:58