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arXiv math-ph/9811023math-phmath.AGmath.MP
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关于厄米矩阵积分的渐近展开的讲座

Lectures on the Asymptotic Expansion of a Hermitian Matrix Integral

Motohico Mulase

摘要:

在这些讲座三种不同的方法计算渐近展开的厄米矩阵积分提出。第一种是利用费曼图的组合方法。这导致我们的生成函数的倒数的顺序的自同构群的平铺的黎曼曲面。第二种方法是基于正交多项式的经典分析。建立了一种严格的渐近方法,并利用Riemann $ζ$ -函数计算了矩阵积分的一种特殊情况。第三种方法是从KP方程的$τ$函数解的公式导出的。这种方法使我们得到一类新的解的KP方程是\emph{transcendental},在这个意义上,他们不能得到著名的Krichever建设及其推广的基础上代数几何的向量丛黎曼曲面。在每一种情况下,建立了一个数学上严格的方法来处理无穷多个变量的渐近级数。

英文摘要:

In these lectures three different methods of computing the asymptotic expansion of a Hermitian matrix integral is presented. The first one is a combinatorial method using Feynman diagrams. This leads us to the generating function of the reciprocal of the order of the automorphism group of a tiling of a Riemann surface. The second method is based on the classical analysis of orthogonal polynomials. A rigorous asymptotic method is established, and a special case of the matrix integral is computed in terms of the Riemann $ζ$-function. The third method is derived from a formula for the $τ$-function solution to the KP equations. This method leads us to a new class of solutions of the KP equations that are \emph{transcendental}, in the sense that they cannot be obtained by the celebrated Krichever construction and its generalizations based on algebraic geometry of vector bundles on Riemann surfaces. In each case a mathematically rigorous way of dealing with asymptotic series in an infinite number of variables is established.

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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