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arXiv 2103.12673math.AGhep-thmath-phmath.MPnlin.SI
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扩展仿射Weyl群的镜像对称

Mirror symmetry for extended affine Weyl groups

Andrea Brini, Karoline van Gemst

AI总结:

本文为扩展仿射Weyl群轨道空间上的Frobenius流形提供了统一的Lie理论镜像对称构造,并以此推导了平坦坐标与预势闭式表达式,计算了Lyashko-Looijenga映射的拓扑度,构造了双Hamiltonian层级。

摘要:

我们为Dubrovin-Zhang在arXiv:hep-th/9611200中于扩展仿射Weyl群轨道空间上定义的Frobenius流形(包括例外Dynkin类型)提供了一种统一的、Lie理论的镜像对称构造。B模型镜像由一维Landau-Ginzburg超势给出,该超势由相应仿射Poisson-Lie群的仿射相对论Toda链的谱曲线族的适当退化构造而成。作为我们镜像定理的应用,我们给出了所有Dynkin类型下Saito度量的平坦坐标和Frobenius预势的闭式表达式,计算了某些高亏格Hurwitz空间层位的Lyashko-Looijenga映射的拓扑度,并构造了流体动力学双Hamiltonian层级(以Lax-Sato和Hamiltonian形式),它们是扩展Toda层级长波极限的根理论推广。

英文摘要:

We give a uniform, Lie-theoretic mirror symmetry construction for the Frobenius manifolds defined by Dubrovin-Zhang in arXiv:hep-th/9611200 on the orbit spaces of extended affine Weyl groups, including exceptional Dynkin types. The B-model mirror is given by a one-dimensional Landau-Ginzburg superpotential constructed from a suitable degeneration of the family of spectral curves of the affine relativistic Toda chain for the corresponding affine Poisson--Lie group. As applications of our mirror theorem we give closed-form expressions for the flat coordinates of the Saito metric and the Frobenius prepotentials in all Dynkin types, compute the topological degree of the Lyashko-Looijenga mapping for certain higher genus Hurwitz space strata, and construct hydrodynamic bihamiltonian hierarchies (in both Lax-Sato and Hamiltonian form) that are root-theoretic generalisations of the long-wave limit of the extended Toda hierarchy.

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