Abstract:
We give a determinantal formula for tau functions of the KP hierarchy in terms of rectangular constant matrices AA, BB, and CC satisfying a rank-one condition. This result is shown to generalize and unify many previous results of different authors on constructions of tau functions for differential and difference integrable systems from square matrices satisfying rank-one conditions. In particular, its explicit special cases include Wilson's formula for tau functions of the rational KP solutions in terms of Calogero–Moser Lax matrices and our previous formula for the KP tau functions in terms of almost-intertwining matrices.
Citation:
M. M. Gekhtman, A. Kasman, “Integrable Systems and Rank-One Conditions for Rectangular Matrices”, TMF, 133:2 (2002), 211–217; Theoret. and Math. Phys., 133:2 (2002), 1498–1503
This publication is cited in the following 13 articles:
Vekslerchik V.E., “Dark Solitons of the Gross-Neveu Model”, Prog. Theor. Exp. Phys., 2022:2 (2022), 023A01
Chuanzhong Li, “Finite-dimensional tau functions of the universal character hierarchy”, Theoret. and Math. Phys., 206:3 (2021), 321–334
Harnad J., Balogh F., “Tau Functions and Their Applications”, Tau Functions and Their Applications, Cambridge Monographs on Mathematical Physics, Cambridge Univ Press, 2021, 1–521
V. E. Vekslerchik, “Solitons of Some Nonlinear Sigma-Like Models”, SIGMA, 16 (2020), 144, 13 pp.
Vekslerchik V.E., “Solitons of the (2+2)-Dimensional Toda Lattice”, J. Phys. A-Math. Theor., 52:4 (2019), 045202
Vekslerchik V.E., “Soliton Fay Identities: II. Bright Soliton Case”, J. Phys. A-Math. Theor., 48:44 (2015), 445204
Vekslerchik V.E., “Soliton Fay Identities: i. Dark Soliton Case”, J. Phys. A-Math. Theor., 47:41 (2014), 415202
Balogh F., Fonseca T., Harnad J., “Finite Dimensional Kadomtsev-Petviashvili Tau-Functions. i. Finite Grassmannians”, J. Math. Phys., 55:8 (2014), 083517
Xu D.-d. Zhang D.-j. Zhao S.-l., “The Sylvester Equation and Integrable Equations: i. the Korteweg-de Vries System and sine-Gordon Equation”, J. Nonlinear Math. Phys., 21:3 (2014), 382–406