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arXiv 0908.3122math.COmath-phmath.MPmath.QA
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T-系簇代数的正性

Positivity of the T-system cluster algebra

P. Di Francesco, R. Kedem

摘要:

给出了一般边界条件下$A_r$ $T$ -系统的团簇代数变量的路径模型解。解是赋权图上(强)不相交路的分拆函数。图是相同的构造$Q$ -系统在我们的早期工作,并依赖于种子或初始数据的解决方案。权重是“时间相关的”,其中“时间”是区分$T$ -系统与$Q$ -系统的额外参数,通常在表示论的上下文中被识别为谱参数。路径模型被交替地描述在具有非交换权重的图上,并且聚类突变被解释为非交换连分数重排。因此,解是种子数据的正洛朗多项式。

英文摘要:

We give the path model solution for the cluster algebra variables of the $A_r$ $T$-system with generic boundary conditions. The solutions are partition functions of (strongly) non-intersecting paths on weighted graphs. The graphs are the same as those constructed for the $Q$-system in our earlier work, and depend on the seed or initial data in terms of which the solutions are given. The weights are "time-dependent" where "time" is the extra parameter which distinguishes the $T$-system from the $Q$-system, usually identified as the spectral parameter in the context of representation theory. The path model is alternatively described on a graph with non-commutative weights, and cluster mutations are interpreted as non-commutative continued fraction rearrangements. As a consequence, the solution is a positive Laurent polynomial of the seed data.

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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