V2EX minimal polynomial

Minimal Polynomial

定义 Definition

minimal polynomial(最小多项式):在线性代数与抽象代数中,指对某个线性变换/矩阵或某个代数元素而言,使其“满足为零”的次数最低的非零一元多项式(通常取首一/monic),并且能整除任何其他使其为零的多项式。该概念常用于分析矩阵的结构(如可对角化性、Jordan 形)以及域扩张中的代数元素。

发音 Pronunciation (IPA)

/mnml plnmil/

词源 Etymology

minimal 来自拉丁语 minimus(“最小的”);polynomial 由 *poly-*(“多”)+ -nomial(与“项/名称”相关)构成,整体表示“多项式”。合起来即“次数最小的多项式”,强调在满足特定代数条件时的“最小性”。

例句 Examples

The minimal polynomial of this matrix is \(x^2-1\).
这个矩阵的最小多项式是 \(x^2-1\)。

Over the rationals, the minimal polynomial of \(\sqrt{2}+\sqrt{3}\) captures the algebraic relations that determine the field extension it generates.
在有理数域上,\(\sqrt{2}+\sqrt{3}\) 的最小多项式刻画了决定它所生成的域扩张的代数关系。

相关词 Related Words

文学与经典著作 Literary Works

  • Abstract Algebra(Dummit & Foote)在域扩张与代数元素章节中系统讨论最小多项式
  • Algebra(Serge Lang)在域论、线性代数相关内容中频繁出现
  • Linear Algebra(Hoffman & Kunze)用于矩阵理论、CayleyHamilton 定理与结构分解
  • Algebra(Michael Artin)在向量空间线性变换与抽象代数语境中使用该术语
  • A Course in Galois Theory(D. J. H. Garling 等同类教材)以最小多项式刻画代数元素并连接伽罗瓦理论
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