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arXiv 2602.01650math.RA
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关于Leavitt代数的同质零分量

On the identity component of a strongly graded ring - with applications to graph algebras

School of Mathematics and Statistics, Nanjing University of Information Science and Technology(南京信息工程大学数学与统计学院)

Raimund Preusser

AI总结:

本文研究了Leavitt代数的零分量结构,证明其为自由积代数的直接极限,并展示了其具有IBN性质。

摘要:

我们证明了Leavitt代数$L(m,n)$关于标准分级的零分量$L(m,n)_0$是一个直接极限$\varinjlim_{z}L(m,n)_{0,z}$,其中每个代数$L(m,n)_{0,z}$都是两个Bergman代数的自由积。对于特殊情况$m=1,n>1$,可以恢复已知结果,即零分量$L(1,n)_0$是矩阵代数的直接极限。此外,我们证明$L(m,n)_0$具有IBN性质。

英文摘要:

Let $G$ be a group, $K$ a commutative ring and $A$ a strongly $G$-graded $K$-algebra with a given homogeneous presentation. We show that the identity component $A_e$ can be obtained by successively applying some of Bergman's universal ring constructions to the underlying ring $K$. This yields a presentation of $A_e$ in terms of generators and relations, which depends on the given presentation of $A$ and the choice of ``frames'', which identify each $A_g$ with a direct summand of a free $A_e$ module of finite rank. We use this result to describe the $0$-components of canonically $\mathbb{Z}$-graded Leavitt algebras and Leavitt path algebras of finite hypergraphs without sinks and sources.

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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