...A mathematical term. Something is said to be reducible if it can be reduced to a simpler one, or if it can be decomposed into a simpler one; otherwise, it is said to be irreducible. Specifics must be stated for each object. (1) In a fraction, if the numerator and denominator do not contain any common divisors, it is called an irreducible fraction. (2) In a matrix representation of a group, if it does not contain any lower-order representations, the representation is said to be irreducible. (3) If an algebraic variety cannot be expressed as the sum of a finite number of proper subvarieties, it is called an irreducible algebraic variety. ... *Some of the terminology explanations that mention "reducible polynomials" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…数学用語。あるものがより単純なものに帰着する場合,またはより単純なものに分解する場合に可約であるといい,そうでないとき既約であるという。具体的には対象ごとに述べる必要がある。(1)分数において,分母分子が共通の約数を含まないとき既約分数という。(2)群の行列表現においてそれが低次の表現を含まないときに,その表現は既約であるという。(3)代数多様体が真部分多様体有限個の和に表せないとき,既約代数多様体という。… ※「可約多項式」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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