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arXiv 0907.2744math.FAmath.AG
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紧交换齐性空间上的不变函数代数

Invariant function algebras on compact commutative homogeneous spaces

V. M. Gichev

摘要:

设$M$是紧李群$G$的交换齐性空间,$A$是Banach代数$C(M)$的闭$G$ -不变子代数.一个函数代数称为反对称的,如果它不包含非常数实函数。通过本文的主要结果,证明了$A$是反对称的当且仅当$M$上的不变概率测度在$A$上是乘法的.这意味着,例如,下面的定理:如果$G^{\mathbb C}$传递地作用在Stein流形$\cal M$,$v\in{\cal M}$上,并且紧轨道$M=Gv$是可交换的齐次空间,则$M$是$\cal M$的实形式。

英文摘要:

Let $M$ be a commutative homogeneous space of a compact Lie group $G$ and $A$ be a closed $G$-invariant subalgebra of the Banach algebra $C(M)$. A function algebra is called antisymmetric if it does not contain nonconstant real functions. By the main result of this paper, $A$ is antisymmetric if and only if the invariant probability measure on $M$ is multiplicative on $A$. This implies, for example, the following theorem: if $G^{\mathbb C}$ acts transitively on a Stein manifold $\cal M$, $v\in{\cal M}$, and the compact orbit $M=Gv$ is a commutative homogeneous space, then $M$ is a real form of $\cal M$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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