Matrix factorizations and pentagon maps

P Kassotakis - Proceedings of the Royal Society A, 2023 - royalsocietypublishing.org
We propose a specific class of matrices that participate in factorization problems that turn out
to be equivalent to constant and entwining (non-constant) pentagon, reverse-pentagon or …

[PDF][PDF] On non-abelian quadrirational Yang-Baxter maps

P Kassotakis, T Kouloukas - arXiv preprint arXiv:2109.11975, 2021 - arxiv.org
In the recent years there is a growing interest in deriving and extending discrete integrable
systems to the non-abelian domain. At the same time there is an intrinsic connection of …

Multi-component extension of CAC systems

DD Zhang, PH Van der Kamp, DJ Zhang - SIGMA. Symmetry, Integrability …, 2020 - emis.de
In this paper an approach to generate multi-dimensionally consistent $ N $-component
systems is proposed. The approach starts from scalar multi-dimensionally consistent …

Non-Abelian elastic collisions, associated difference systems of equations and discrete analytic functions

P Kassotakis, T Kouloukas, M Nieszporski - arXiv preprint arXiv …, 2024 - arxiv.org
We extend the equations of motion that describe non-relativistic elastic collision of two
particles in one dimension to an arbitrary associative algebra. Relativistic elastic collision …

Yang–Baxter maps of KdV, NLS and DNLS type on division rings

S Konstantinou-Rizos, AA Nikitina - Physica D: Nonlinear Phenomena, 2024 - Elsevier
We construct nocommutative set-theoretical solutions to the Yang–Baxter equation related to
the KdV, the NLS and the derivative NLS equations. In particular, we construct several Yang …

A Revisit to the ABS H2 Equation

AA Cho, M Mesfun, DJ Zhang - SIGMA. Symmetry, Integrability and …, 2021 - emis.de
In this paper we revisit the Adler-Bobenko-Suris H2 equation. The H2 equation is linearly
related to the $ S^{(0, 0)} $ and $ S^{(1, 0)} $ variables in the Cauchy matrix scheme. We …

[HTML][HTML] Discrete integrable systems associated with relativistic collisions

TE Kouloukas - Physica D: Nonlinear Phenomena, 2023 - Elsevier
We study vector quadrirational Yang–Baxter maps representing the momentum–energy
transformation of two particles after elastic relativistic collisions. The collision maps admit …

Reductions and degenerate limits of Yang-Baxter maps with Lax matrices

P Adamopoulou, TE Kouloukas… - arXiv preprint arXiv …, 2025 - arxiv.org
We generalise a family of quadrirational parametric Yang-Baxter maps with $3\times 3$ Lax
matrices by introducing additional essential parameters. These maps preserve a prescribed …

Two-component Yang–Baxter maps and star-triangle relations

AP Kels - Physica D: Nonlinear Phenomena, 2023 - Elsevier
It is shown how Yang–Baxter maps may be directly obtained from classical counterparts of
the star-triangle relations and quantum Yang–Baxter equations. This is based on …

Lax matrices for lattice equations which satisfy consistency-around-a-face-centered-cube

AP Kels - Nonlinearity, 2021 - iopscience.iop.org
There is a recently discovered formulation of the multidimensional consistency integrability
condition for lattice equations, called consistency-around-a-face-centered-cube (CAFCC) …