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arXiv 1901.04166math.AG
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散射图中的团簇结构和子扇

Cluster structures and subfans in scattering diagrams

Yan Zhou

摘要:

我们给出了一次穿孔环面上的簇参数化${\rm SL}_{2}/{\rm PGL}_{2}$ -局部系统的Fock-Goncharov对偶猜想的更精确的陈述。然后我们证明这些陈述。一路上,在散射图中使用不同的子风扇,我们产生了一个例子,一个集群品种与两个非等价的集群结构。为了克服散射图中存在的无限非团簇越壁的技术难题,我们在散射图的构造中引入了双折叠,给出了散射图的商构造.

英文摘要:

We give more precise statements of Fock-Goncharov duality conjecture for cluster varieties parametrizing ${\rm SL}_{2}/{\rm PGL}_{2}$-local systems on the once punctured torus. Then we prove these statements. Along the way, using distinct subfans in the scattering diagram, we produce an example of a cluster variety with two non-equivalent cluster structures. To overcome the technical difficulty of infinite non-cluster wall-crossing in the scattering diagram, we introduce quiver folding into the machinery of scattering diagrams and give a quotient construction of scattering diagrams.

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