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arXiv 2011.03720math.RT
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由投射丛变量生成的丛代数

Cluster algebras generated by projective cluster variables

Karin Baur, Alireza Nasr-Isfahani

AI总结:

该研究提出由投射丛变量生成的下界丛代数概念,证明无环条件下其与丛代数一致并可构造丛代数的基,且$A_n$、$\tilde{A}_n$型无系数丛代数均等于对应下界丛代数。

摘要:

我们引入了由投射丛变量生成的下界丛代数的概念,它是初始丛变量与所谓投射丛变量上的多项式环。我们证明,在无环假设下,丛代数与由投射丛变量生成的下界丛代数是一致的。在该情形下,我们利用所得结果构造了该丛代数的一组基。我们还证明,任何$A_n$型或$\tilde{A}_n$型的无系数丛代数,都等于对应的由投射丛变量生成的下界丛代数。

英文摘要:

We introduce the notion of a lower bound cluster algebra generated by projective cluster variables as a polynomial ring over the initial cluster variables and the so-called projective cluster variables. We show that under an acyclicity assumption, the cluster algebra and the lower bound cluster algebra generated by projective cluster variables coincide. In this case we use our results to construct a basis for the cluster algebra. We also show that any coefficient-free cluster algebra of types $A_n$ or $\widetilde{A}_n$ is equal to the corresponding lower bound cluster algebra generated by projective cluster variables.

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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