V2EX lie algebra

Lie Algebra

Definition / 定义

Lie algebra(李代数)是一个向量空间,配备一种称为“李括号”的双线性运算 \([x,y]\),满足反对称性(或交替性)与雅可比恒等式。它常用于描述连续对称性,并与李群密切相关。

Pronunciation / 发音

/li l.d.br/

Examples / 例句

A Lie algebra helps us study continuous symmetry in mathematics and physics.
李代数帮助我们研究数学与物理中的连续对称性。

In representation theory, we often classify modules by analyzing the structure of a Lie algebra and its brackets.
在表示论中,我们常通过分析李代数及其括号运算的结构来分类模。

Etymology / 词源

“Lie”来自挪威数学家 Sophus Lie(索菲斯李) 的姓氏,他在19世纪系统发展了研究连续变换群(李群)的方法;“algebra”源自阿拉伯语 al-jabr(意为“复原、配平”),经由拉丁化进入欧洲语言,最终形成英语 algebra(代数)。

Related Words / 相关词

Literary Works / 文学作品

  • Introduction to Lie Algebras and Representation Theory(James E. Humphreys)
  • Lie Groups, Lie Algebras, and Representations: An Elementary Introduction(Brian C. Hall)
  • Theory of Lie Groups(lie Cartan)
  • The Classical Groups: Their Invariants and Representations(Hermann Weyl)
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