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arXiv 1903.08484math.RTmath.RA
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关于有限维代数$A$的$HH^1(A)$的李代数结构

On the Lie algebra structure of $HH^1(A)$ of a finite-dimensional algebra $A$

Markus Linckelmann, Lleonard Rubio y Degrassi

摘要:

设$A$是域上的分裂有限维结合酉代数。本文的第一个主要结果表明:如果$A$的外延是一个简单有向图,则$HH^1(A)$是一个可解李代数。第二个主要结果表明,如果$A$的Ext箭图没有环,并且在任何方向上最多有两个平行箭头,并且如果$HH^1(A)$是简单的李代数,则char(k)不等于$2$和$HH^1(A)\cong$ $sl_2(k)$。第三个结果研究了具有一个顶点带一个单圈的环的对称代数。

英文摘要:

Let $A$ be a split finite-dimensional associative unital algebra over a field. The first main result of this note shows that if the Ext-quiver of $A$ is a simple directed graph, then $HH^1(A)$ is a solvable Lie algebra. The second main result shows that if the Ext-quiver of $A$ has no loops and at most two parallel arrows in any direction, and if $HH^1(A)$ is a simple Lie algebra, then char(k) is not equal to $2$ and $HH^1(A)\cong$ $sl_2(k)$. The third result investigates symmetric algebras with a quiver which has a vertex with a single loop.

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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