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Numerical results, based on a lattice method for computational general relativity, will be presented for Cauchy evolution of initial data for the Brill, Teukolsky and polarised Gowdy space-times. The simple objective of this paper is to…

General Relativity and Quantum Cosmology · Physics 2017-08-02 Leo Brewin

We study the Cauchy problem associated with the equations governing a fluid loaded plate formulated on either the line or the half-line. We show that in both cases the problem can be solved by employing the unified approach to boundary…

Analysis of PDEs · Mathematics 2015-05-13 Anthony C. L Ashton , A. S. Fokas

By incorporating a new matrix splitting and the momentum acceleration into the relaxed-based matrix splitting (RMS) method \cite{soso2023}, a generalization of the RMS (GRMS) iterative method for solving the generalized absolute value…

Numerical Analysis · Mathematics 2025-03-04 Xuehua Li , Cairong Chen , Deren Han

The lattice Boussinesq equation (BSQ) is a three-component difference-difference equation defined on an elementary square of the 2D lattice, having 3D consistency. We write the equations in the Hirota bilinear form and construct their…

Exactly Solvable and Integrable Systems · Physics 2011-05-27 Jarmo Hietarinta , Da-jun Zhang

A lattice quantum gravity model in 4 dimensional Riemannian spacetime is constructed based on the SU(2) Ashtekar formulation of general relativity. This model can be understood as one of the family of models sometimes called ``spin foam…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Junichi Iwasaki

We study certain generalized Cauchy integral formulas for gradients of solutions to second order divergence form elliptic systems, which appeared in recent work by P. Auscher and A. Ros\'en. These are constructed through functional calculus…

Analysis of PDEs · Mathematics 2012-10-30 Andreas Rosén

A large family of linear, usually overdetermined, systems of partial differential equations that admit a multiplication of solutions, i.e, a bi-linear and commutative mapping on the solution space, is studied. This family of PDE's contains…

Analysis of PDEs · Mathematics 2008-03-19 Jens Jonasson

A generalisation of the Lattice Potential Kadomtsev-Petviashvili (LPKP) equation is presented, using the method of Direct Linearisation based on an elliptic Cauchy kernel. This yields a (3+1)-dimensional lattice system with one of the…

Exactly Solvable and Integrable Systems · Physics 2015-06-16 Paul Jennings , Frank Nijhoff

A notion of the generalized invariant manifold for a nonlinear integrable lattice is considered. Earlier it has been observed that this kind objects provide an effective tool for evaluating the recursion operators and Lax pairs. In this…

Exactly Solvable and Integrable Systems · Physics 2020-06-16 I. T. Habibullin , A. R. Khakimova

We present a compact and general derivation of the generalized Bloch-Wangsness-Redfield kinetic equations for systems with the static spin Hamiltonian utilizing the concept of the Liouville space. We show that the assumptions of short…

Statistical Mechanics · Physics 2011-07-12 Nail Fatkullin

We introduce a general and accurate method for determining lattice phase shifts and mixing angles, which is applicable to arbitrary, non-cubic lattices. Our method combines angular momentum projection, spherical wall boundaries and an…

Nuclear Theory · Physics 2016-07-19 Bing-Nan Lu , Timo A. Lähde , Dean Lee , Ulf-G. Meißner

I begin by discussing the basic ideas of quantum field theory (QFT). I provide a review of symmetries in physics and then move on to discuss the quark model. I then review lattice gauge theory with particular attention paid to lattice QCD…

High Energy Physics - Lattice · Physics 2009-09-29 W Armour

Adler's lattice equation has acquired the status of a master equation among 2D discrete integrable systems. In this paper we derive what we believe are the first explicit solutions of this equation. In particular it turns out necessary to…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 James Atkinson , Jarmo Hietarinta , Frank Nijhoff

We study two families of (matrix versions of) generalized Volterra (or Bogoyavlensky) lattice equations. For each family, the equations arise as reductions of a partial differential-difference equation in one continuous and two discrete…

Exactly Solvable and Integrable Systems · Physics 2017-03-08 Folkert Müller-Hoissen , Oleksandr Chvartatskyi , Kouichi Toda

It is well known that from two-dimensional lattice equations one can derive one-dimensional lattice equations by imposing periodicity in some direction. In this paper we generalize the periodicity condition by adding a symmetry…

Exactly Solvable and Integrable Systems · Physics 2015-06-16 Christopher M. Ormerod , Peter H. van der Kamp , Jarmo Hietarinta , G. R. W. Quispel

The expressions of solutions for general $n\times m$ matrix-valued inhomogeneous linear stochastic differential equations are derived. This generalizes a result of Jaschke (2003) for scalar inhomogeneous linear stochastic differential…

Dynamical Systems · Mathematics 2008-08-11 Jinqiao Duan , Jia-an Yan

We propose a method by which to examine all possible partial difference Lax pairs that consist of 'two by two' discrete linear problems, where the matrices contain one separable term in each entry. We thereby derive new, higher-order…

Exactly Solvable and Integrable Systems · Physics 2008-06-25 Mike Hay

We show that integrable vertex and RSOS models with trigonometric Boltzmann weights and appropriate inhomogeneities provide a convenient lattice regularization for massive field theories and for the recently studied massless field theories…

High Energy Physics - Theory · Physics 2009-10-22 N. Yu Reshetikhin , H. Saleur

In this paper it is shown that a generalized circulant matrix underlies every weakly Coupled Map Lattice (CML), independently of the form of the coupling term. Therefore, this matrix will appear always perturbative methods are used to get…

Pattern Formation and Solitons · Physics 2009-03-25 M. Dolores Sotelo Herrera Jesus San Martin

In this research paper, we present an exact matrix form analytical solution of the multi-dimensional generalized Langevin equation with quadratic potentials. Our investigation provides detailed expressions for the two-dimensional…

Statistical Mechanics · Physics 2025-11-26 Rana Imran Mushtaq , Chunyang Wang , Shi Zhi , Zengxuan Zhao , J M Nyasulu