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arXiv 0905.0059math.AG
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二聚体模型和特殊的McKay对应

Dimer models and the special McKay correspondence

Akira Ishii, Kazushi Ueda

摘要:

研究了二聚体模型在格点多边形去角取其余部分的凸包操作下的行为。这是对Gulotta运算的一种改进,而特殊的McKay对应在这种改进中起着至关重要的作用。作为推论,我们证明了对于任意格点多边形,存在一个二聚体模型,使得对应的具有关系的格点的路径代数上的有限生成模的导出范畴等价于由格点多边形确定的复曲面Calabi-Yau 3-fold上的相干层的导出范畴.我们的证明是基于二聚体模型的组合数学与模空间几何之间的关系的详细研究,而不依赖于math/9908027的结果。

英文摘要:

We study the behavior of a dimer model under the operation of removing a corner from the lattice polygon and taking the convex hull of the rest. This refines an operation of Gulotta, and the special McKay correspondence plays an essential role in this refinement. As a corollary, we show that for any lattice polygon, there is a dimer model such that the derived category of finitely-generated modules over the path algebra of the corresponding quiver with relations is equivalent to the derived category of coherent sheaves on a toric Calabi-Yau 3-fold determined by the lattice polygon. Our proof is based on a detailed study of relationship between combinatorics of dimer models and geometry of moduli spaces, and does not depend on the result of math/9908027.

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