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arXiv 2102.01392math.RT
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$τ$-通过源点处的简单模块在单点扩展上倾斜模块

$τ$-Tilting modules over one-point extensions by a simple module at a source point

Hanpeng Gao

摘要:

设$B$是有限维$k$-代数$A$在源点$i$上通过简单$A$-模的单点扩张.本文对$B$上的$τ$-倾斜模进行了分类.进而证明了存在方程$$|\tilt B|=|\tilt A|+|\tilt A/\langle e_i\rangle|\quad \text{and}\quad |\stilt B|=2|\stilt A|+|\stilt A/\langle e_i\rangle|.$$.由此,我们可以计算平方根为零的线性Dynkin型代数上的$τ$-倾斜模和支撑$τ$-倾斜模的个数.

英文摘要:

Let $B$ be an one-point extension of a finite dimensional $k$-algebra $A$ by a simple $A$-module at a source point $i$. In this paper, we classify the $τ$-tilting modules over $B$. Moreover, it is shown that there are equations $$|\tilt B|=|\tilt A|+|\tilt A/\langle e_i\rangle|\quad \text{and}\quad |\stilt B|=2|\stilt A|+|\stilt A/\langle e_i\rangle|.$$ As a consequence, we can calculate the numbers of $τ$-tilting modules and support $τ$-tilting modules over linearly Dynkin type algebras whose square radical are zero.

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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