Cyclotomic field

Japanese: cyclotomic field(英語表記)cyclotomicfield
Cyclotomic field

… Important examples of algebraic number fields include quadratic fields and cyclotomic fields. In general, a field obtained by adding a primitive m- th root of 1 to Q is called a cyclotomic field. When m is a prime number p , X p -1 + X p -2 + ... + X +1 is an irreducible polynomial, so [ Qp -1 ): Q ] = p -1. …

*Some of the terminology that refers to "cyclotomic field" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 代数体の重要な例として,二次体,円分体がある。一般に1の原始m乗根,をQに添加して得られる体を円分体cyclotomic fieldという。mが素数pのとき, Xp-1Xp-2+……+X+1は既約な多項式だから[Qp-1):Q]=p-1である。…

※「cyclotomic field」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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