Diagonal Tau-Functions of 2D Toda Lattice Hierarchy, Connected ( , )-Point Functions, and Double Hurwitz Numbers

• Veröffentlicht in: Symmetry, Integrability and Geometry: Methods and Applications
• Datum: 2023
• Hauptverfasser: Wang, Zhiyuan, Yang, Chenglang
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Інститут математики НАН України 2023
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/212046
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Diagonal Tau-Functions of 2D Toda Lattice Hierarchy, Connected ( , )-Point Functions, and Double Hurwitz Numbers. Zhiyuan Wang and Chenglang Yang. SIGMA 19 (2023), 085, 33 pages

We derive an explicit formula for the connected ( , )-point functions associated with an arbitrary diagonal tau-function ( ⁺, ⁻) of the 2d Toda lattice hierarchy using fermionic computations and the boson-fermion correspondence. Then, for fixed ⁻, we compute the KP-affine coordinates of ( ⁺, ⁻...