V2EX maximal ideal

Maximal Ideal

定义 Definition

极大理想:在环 \(R\) 中,一个真理想 \(M\neq R\) 称为极大理想,如果不存在介于 \(M\) 与 \(R\) 之间的更大的真理想;也就是说,若 \(M\subseteq I\subseteq R\),则只能有 \(I=M\) 或 \(I=R\)。等价地,\(M\) 是极大理想当且仅当商环 \(R/M\) 是一个。(该术语在抽象代数、交换代数中最常见;在非交换情形也可讨论,但定义细节可能更复杂。)

发音 Pronunciation (IPA)

/mksml adil/

例句 Examples

A maximal ideal is a proper ideal that cannot be enlarged without becoming the whole ring.
极大理想是指一种真理想:一旦再扩大,就会变成整个环。

In commutative algebra, the correspondence between maximal ideals of \(R\) and field quotients \(R/M\) is fundamental for studying ring structure and algebraic geometry.
在交换代数中,环 \(R\) 的极大理想与域商 \(R/M\) 之间的对应关系是研究环结构与代数几何的基本工具。

词源 Etymology

maximal 来自拉丁语 maximus(“最大”),表示“在某种偏序意义下的最大/极大”;ideal 在代数学中由 19 世纪数学传固定为“理想(子结构)”之意。合起来,maximal ideal 字面即“极大(在包含关系下)理想”,强调“再大就不再是适当的理想”。

相关词 Related Words

文学与经典著作 Literary Works

  • Introduction to Commutative Algebra M. F. Atiyah & I. G. Macdonald
  • Commutative Algebra with a View Toward Algebraic Geometry David Eisenbud
  • Algebra Serge Lang
  • Algebraic Geometry Robin Hartshorne
  • Algebra Michael Artin
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