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characteristic class

  • 特征类:在数学中,特征类是将X的每个主丛与X的上同调类相关联的一种方式。上同调类衡量了丛的“扭曲”程度以及是否具有截面。特征类是全局不变量,衡量了局部乘积结构与全局乘积结构之间的偏差。它们是代数拓扑学、微分几何学和代数几何学中统一的几何概念之一。

网络释义专业释义英英释义

  [数] 示性类

事实上陈省身教授在Euler示性数以及更广义的所谓示性类(characteristic class)方面的工作即现在所谓的陈类(Chern class)的光辉成就,在这时已经逐渐孕育和形成了。

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短语

arithmetic characteristic class 算术的特性类

Characteristic Class Arrangement 课程安排 ; 丰富多彩的课程安排

characteristic class of a manifold 流形的示性类

secondary characteristic class 二阶示性类

characteristic class of manifold [数] 流形的示性类

Chern characteristic class 陈示性类

theory of characteristic class 示性类理论

symplectic pontryagin characteristic class 辛Pontryagin示性类

Selection of characteristic steak class 选择的特点牛排班 ; 特色牛排类的选择

 更多收起网络短语
  • 示性类 - 引用次数:9

    参考来源 - 乘积空间上向量丛的示性类与带群作用流形的协边分类
    特征曲线类型
  • 特征集合 - 引用次数:6

    参考来源 - CO

·2,447,543篇论文数据,部分数据来源于NoteExpress

Characteristic class

  • abstract: In mathematics, a characteristic class is a way of associating to each principal bundle on a topological space X a cohomology class of X. The cohomology class measures the extent to which the bundle is "twisted" — particularly, whether it possesses sections or not.

以上来源于: WordNet

双语例句权威例句

  • Usually, an income of that size requires regular, formal employment, with a salary and some benefits, that is, a steady job-another key middle-class characteristic.

    通常,那种水平收入需要固定正式职业工资保险,即稳定的工作——中产阶级的另关键特点

    youdao

  • According to the characteristic of current information technology class, this paper analyzes several attributes of game CAI, generalizes its main characteristic and describes them in detail.

    本文根据当前信息技术课堂特点分析游戏式CAI所应具有属性归纳主要特征对其进行了详细描述

    youdao

  • No matter be to be in Beijing or Shanghai, the characteristic with common place of top class meeting depends on, client group be confined to is located in "pyramid is pointed" crowd.

    无论是北京还是上海顶级会所共同特征在于客户群体只限于位于金字塔”的人群

    youdao

更多双语例句
  • The revolt of this class, he thinks, could be the defining characteristic of the election, counting more even than the rise of the (also mostly white, but mostly more affluent) tea-party movement.

    ECONOMIST: Lexington

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