19-23 June 2023
Faculty of Physics, University of Warsaw
Europe/Warsaw timezone
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Lagrangian multiform theory


Location: Faculty of Physics, University of Warsaw
Address: Pasteura 5, Warsaw
Room: Lecture hall: 0.06
Date: 21 Jun 11:30 - 13:00

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Displaying 3 contributions out of 3
Recently I presented a Lagrangian 3-form structure for a generalised Darboux system. The original Darboux system arose in connection with the theory of conjugate nets for systems of orthogonal curvilinear coordinates. The generalised system, in which the relevant fields are labelled by continuous parameters which can be associated with lattice parameters of an underlying 3-dimensional integrable ... More
Presented by Prof. Frank NIJHOFF on 21/06/2023 at 09:30
In aiming to find simple nonlinear Lagrangian 1-forms that exhibit all the relevant features of a multiform structure, we investigate Lagrange structures arising from addition formulae. This results in non-quadratic Lagrangians and commuting maps with discrete and continuous interpolation flows. We discuss the relationship to integrable quad equations and applications to quantum propagators.
Presented by Mr. Jacob RICHARDSON on 21/06/2023 at 10:00
The talk contains two parts. In the first part I will describe a bilinear framework for elliptic soliton solutions (which are composed by the Lamé-type plane wave factors and expressed using Weierstrass functions). The framework includes tau functions in Hirota’s form, vertex operators to generate such tau functions and the associated bilinear identities. These are introduced in detail for the ... More
Presented by Prof. Da-jun ZHANG on 21/06/2023 at 10:30
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