2 papers
nlin.SI2025
Discrete Lagrangian Multiforms for ABS Equations I: Quad Equations
Jacob J. Richardson, Mats Vermeeren
Discrete Lagrangian multiform theory is a variational perspective on lattice equations that are integrable in the sense of multidimensional consistency. The Lagrangian multiforms f…
nlin.SI2025
Discrete Lagrangian Multiforms for ABS Equations II: Tetrahedron and Octahedron Equations
Jacob J. Richardson, Mats Vermeeren
We present four types of discrete Lagrangian 2-form associated to the integrable quad equations of the ABS list. These include the triangle Lagrangian that has traditionally been u…