发表于2024-11-04
表示论基本教程 2024 pdf epub mobi 电子书
图书标签: 表示论 数学 代数 GTM Algebra 抽象代数 我需要 其余代数7
The primary goal of these lectures is to introduce a beginner to the finite dimensional representations of Lie groups and Lie algebras. Since this goal is shared by quite a few other books, we should explain in this Preface how our approach differs, although the potential reader can probably see this better by a quick browse through the book. Representation theory is simple to define: it is the study of the ways in which a given group may act on vector spaces. It is almost certainly unique, however, among such clearly delineated subjects, in the breadth of its interest to mathematicians. This is not surprising: group actions are ubiquitous in 20th century mathematics, and where the object on which a group acts is not a vector space, we have learned to replace it by one that is {e. g. , a cohomology group, tangent space, etc. }. As a consequence, many mathematicians other than specialists in the field {or even those who think they might want to be} come in contact with the subject in various ways. It is for such people that this text is designed. To put it another way, we intend this as a book for beginners to learn from and not as a reference. This idea essentially determines the choice of material covered here. As simple as is the definition of representation theory given above, it fragments considerably when we try to get more specific.
更適合初學者
评分让newleft帮我把这本书带到美国真是太明智了
评分通过修改具体的例子得到抽象模型的结构。弗罗贝尼乌斯互反定理:限制和诱导是一对伴随的函子,类比hom和张量是一对伴随函子。表示论的困难一在于其定义就是双对象也就是范畴或者是模,而不是过去的单个对象(或者是向量空间或者线性映射);其次,在于不同的代数结构之间的关系和转换,表示论和范畴,模自然关联:群表示论是非交换环上模的特例,有限群是半单代数的特例,而半单代数通过wedderburn定理可以同构于可除代数(矩阵是其特例),通过修正矩阵代数中的Jordan正则形式可以得到李代数的抽象分解:直和+幂零(可解)代数。诺特发现代数这个简化的环结构,用群代数的模等价于有限群表示。群的正规表示就是把群代数看做自身的左模 不可约表示 就是群代数模是单的。杨氏表 是构造对称群的不可约表示的显示基底
评分让newleft帮我把这本书带到美国真是太明智了
评分让newleft帮我把这本书带到美国真是太明智了
表示论基本教程 2024 pdf epub mobi 电子书