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单词 transcendental number
释义

transcendental number

英汉-汉英词典
超越数
词组 | 习惯用语
您要查找的是不是:
    transcendental number theory 超越数论
transcendental number [数] 超越数
中文百科

超越数

在数论中,超越数是指任何一个不是代数数的无理数。只要它不是任何一个有理系数代数方程的根,它即是超越数。最著名的超越数是e以及π。

超越数是代数数的相反,也即是说若x是一个超越数,那么对于任何整数a_n, a_{n-1}, \ldots, a_0都符合:

a_n x^n + a_{n-1} x^{n-1} + \ldots + a_2 x^2 + a_1 x + a_0 \ne 0

(其中an≠0)

英语百科

Transcendental number 超越数

In mathematics, a transcendental number is a real or complex number that is not algebraic—that is, it is not a root of a non-zero polynomial equation with rational coefficients. The best-known transcendental numbers are π and e. Though only a few classes of transcendental numbers are known (in part because it can be extremely difficult to show that a given number is transcendental), transcendental numbers are not rare. Indeed, almost all real and complex numbers are transcendental, since the algebraic numbers are countable while the sets of real and complex numbers are both uncountable. All real transcendental numbers are irrational, since all rational numbers are algebraic. The converse is not true: not all irrational numbers are transcendental; e.g., the square root of 2 is irrational but not a transcendental number, since it is a solution of the polynomial equation x − 2 = 0.

近义、反义、联想词
近义词
n.
irrational number, irrational

英英词典
transcendental number n.
  1. an irrational number that is not algebraic
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更新时间:2025/6/19 13:25:57