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arXiv 2203.13142math-phmath.DGmath.MPnlin.SI
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无限维Dubrovin-Frobenius流形与Stokes现象

Infinite-dimensional Dubrovin-Frobenius manifolds and the Stokes phenomenon

Guido Carlet, Francisco Hernández Iglesias

摘要:

研究了无限维二维Toda Dubrovin-Frobenius流形的Dubrovin方程在其非正则奇点处的解.我们首先重新定义的规范坐标,证明他们自然出现的广义本征值的算子乘欧拉向量场。然后,我们表明,在不规则奇点的指数型行为的Dubrovin方程的正式解决方案是不是唯一确定的领导秩序,而是取决于一个无限多的参数,相反,在有限维的情况下发生的。接下来,我们得到一个大家庭的解决方案Dubrovin方程的积分沿单位圆的某些组合的超势。观察到这样的家庭是不完整的,有平凡的monodromy,我们研究了一个更大的家庭弱解通过Borel重算的一些著名的正式解决方案。这些解自然地出现在单值相关的对中,最终使我们能够计算斯托克斯矩阵的无限维模拟。

英文摘要:

We study the Dubrovin equation of the infinite-dimensional 2D Toda Dubrovin-Frobenius manifold at its irregular singularity. We first revisit the definition of the canonical coordinates, proving that they emerge naturally as generalized eigenvalues of the operator of multiplication by the Euler vector field. We then show that the formal solutions to the Dubrovin equation with exponential type behaviour at the irregular singular point are not uniquely determined by their leading order, but instead depend on an infinite number of parameters, contrary to what happens in the finite-dimensional case. Next, we obtain a large family of solutions to the Dubrovin equation given by integrals along the unit circle of certain combinations of the superpotentials. Observing that such a family is not complete and has trivial monodromy, we study a larger family of weak solutions obtained via Borel resummation of some distinguished formal solutions. These resummed solutions naturally appear in monodromy-related pairs, finally allowing us to compute the infinite-dimensional analogue of the Stokes matrices.

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