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From wave functions to tau-functions for the Volterra lattice hierarchy

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Abstract

For an arbitrary solution to the Volterra lattice hierarchy, the logarithmic derivatives of the tau-function of the solution can be computed by the matrix-resolvent method. In this paper, we define a pair of wave functions of the solution and use them to give an expression of the matrix resolvent; based on this we obtain a new formula for the k-point functions for the Volterra lattice hierarchy in terms of wave functions. As an application, we give an explicit formula of k-point functions for the even GUE (Gaussian Unitary Ensemble) correlators.

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Correspondence to Di Yang.

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Conflict of Interest The authors declare no conflict of interest.

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The work was partially supported by the National Key R and D Program of China (2020YFA0713100).

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Fu, A., Li, M. & Yang, D. From wave functions to tau-functions for the Volterra lattice hierarchy. Acta Math Sci 44, 405–419 (2024). https://doi.org/10.1007/s10473-024-0201-4

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  • DOI: https://doi.org/10.1007/s10473-024-0201-4

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