arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.04874math.FA
收藏

关于Banach模的某些乘积

On certain product of Banach modules

Mohammad Ramezanpour

摘要:

设$A$和$B$是巴拿赫代数,$B$是代数Banach $A-$双模.则具有乘法$$(a_1,b_1)(a_2,b_2)=(a_1a_2,a_1\cdot b_2+b_1\cdot a_2+b_1b_2),~~ (a_1, a_2\in A, b_1, b_2\in B)$$的$\ell^1-$直和$A\times B$是一个用$A\bowtie B$表示的巴拿赫代数。模扩张代数、Lau积以及巴拿赫代数的直和是满足这一框架的主要例子。我们得到了这个乘积的有界逼近恒等式、谱和拓扑中心的特征。这为得到巴拿赫代数的模扩张和Lau积的一些已知结果提供了一个统一的途径。

英文摘要:

Let $A$ and $B$ be Banach algebras and let $B$ be an algebraic Banach $A-$bimodule. Then the $\ell^1-$direct sum $A\times B$ equipped with the multiplication $$(a_1,b_1)(a_2,b_2)=(a_1a_2,a_1\cdot b_2+b_1\cdot a_2+b_1b_2),~~ (a_1, a_2\in A, b_1, b_2\in B)$$ is a Banach algebra denoted by $A\bowtie B$. Module extension algebras, Lau product and also the direct sum of Banach algebras are the main examples satisfying this framework. We obtain characterizations of bounded approximate identities, spectrum, and topological center of this product. This provides a unified approach for obtaining some known results of both module extensions and Lau product of Banach algebras.

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。

↑