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We investigate the initial-boundary value problem for the integrable spin-1 Gross-Pitaevskii (GP) equations with a 4x4 Lax pair on the half-line. The solution of this system can be obtained in terms of the solution of a 4x4 matrix…

Exactly Solvable and Integrable Systems · Physics 2017-06-07 Zhenya Yan

In this paper, we apply Fokas unified method to study initial-boundary value problems for the two-component Gerdjikov-Ivanov equation formulated on the finite interval with $3 \times 3$ Lax pairs. The solution can be expressed in terms of…

Exactly Solvable and Integrable Systems · Physics 2017-11-22 Qiaozhen Zhu , Jian Xu , Engui Fan

We investigate the initial-boundary value problem for the general three-component nonlinear Schrodinger (gtc-NLS) equation with a 4x4 Lax pair on a finite interval by extending the Fokas unified approach. The solutions of the gtc-NLS…

Exactly Solvable and Integrable Systems · Physics 2021-11-19 Zhenya Yan

We present an approach for analyzing initial-boundary value problems which is formulated on the finite interval ($0\le x\le L$, where $L$ is a positive constant) for integrable equations whose Lax pairs involve $3\times 3$ matrices.…

Exactly Solvable and Integrable Systems · Physics 2015-09-10 Jian Xu , Engui Fan

We present a Riemann-Hilbert problem formalism for the initial-boundary value problem for the Sasa-Satsuma(SS) equation on the finite interval. Assume that the solution existes, we show that this solution can be expressed in terms of the…

Exactly Solvable and Integrable Systems · Physics 2015-12-22 Jian Xu , Qiaozhen Zhu , Engui Fan

We employ the Ablowitz-Ladik system as an illustrative example in order to demonstrate how to analyze initial-boundary value problems for integrable nonlinear differential-difference equations via the unified transform (Fokas method). In…

Exactly Solvable and Integrable Systems · Physics 2018-03-26 Baoqiang Xia , A. S. Fokas

We show how to solve initial-boundary value problems for integrable nonlinear differential-difference equations on a finite set of integers. The method we employ is the discrete analogue of the unified transform (Fokas method). The…

Exactly Solvable and Integrable Systems · Physics 2018-07-02 Baoqiang Xia

Boundary value problems for integrable nonlinear evolution PDEs formulated on the finite interval can be analyzed by the unified method introduced by one of the authors and used extensively in the literature. The implementation of this…

Analysis of PDEs · Mathematics 2015-05-30 J. Lenells , A. S. Fokas

In this paper, we solve explicitly and analyze rigorously inhomogeneous initial-boundary-value problems (IBVP) for several fourth-order variations of the traditional diffusion equation and the associated linearized Cahn-Hilliard (C-H) model…

Analysis of PDEs · Mathematics 2025-12-08 A. Chatziafratis , A. Miranville , G. Karali , A. S. Fokas , E. C. Aifantis

In a previous work, we show that the solution of the initial-boundary value problem for the two-component nonlinear Schr\"odinger equation on the finite interval can be expressed in terms of the solution of a $3\times 3$ Riemann-Hilbert…

Exactly Solvable and Integrable Systems · Physics 2015-12-22 Jian Xu , Engui Fan

We present an approach for analyzing initial-boundary value problems for integrable equations whose Lax pairs involve $3 \times 3$ matrices. Whereas initial value problems for integrable equations can be analyzed by means of the classical…

Exactly Solvable and Integrable Systems · Physics 2015-05-30 Jonatan Lenells

We study an initial value problem for the one-dimensional non-stationary linear Schr\"odinger equation with a point singular potential. In our approach, the problem is considered as a system of coupled initial-boundary value (IBV) problems…

Analysis of PDEs · Mathematics 2020-04-14 Yan Rybalko

We present a method to solve initial-boundary value problems for linear and integrable nonlinear differential-difference evolution equations. The method is the discrete version of the one developed by A. S. Fokas to solve initial-boundary…

Exactly Solvable and Integrable Systems · Physics 2009-11-13 Gino Biondini , Guenbo Hwang

A new method for the solution of initial-boundary value problems for \textit{linear} and \textit{integrable nonlinear} evolution PDEs in one spatial dimension was introduced by one of the authors in 1997 \cite{F1997}. This approach was…

Analysis of PDEs · Mathematics 2011-07-29 Dionyssios Mantzavinos , Athanassios S. Fokas

By employing a novel generalization of the inverse scattering transform method known as the unified transform or Fokas method, it can be shown that the solution of certain physically significant boundary value problems for the elliptic…

Analysis of PDEs · Mathematics 2020-02-14 J. Lenells , A. S. Fokas

We consider the initial boundary value (IBV) problem for the focusing nonlinear Schr\"odinger equation in the quarter plane $x>0,t>0$ in the case of periodic initial data (at $t=0$) and a Robin boundary condition at $x=0$. Our approach is…

Exactly Solvable and Integrable Systems · Physics 2014-12-25 Spyridon Kamvissis , Dmitry Shepelsky , Lech Zielinski

We consider the initial-boundary value (IBV) problem for the modified Camassa--Holm (mCH) equation $ \tilde m_t+\left((\tilde u^2-\tilde u_x^2+2\tilde u)\tilde m\right)_x = 0$, $\tilde m:=\tilde u-\tilde u_{xx}+1$ on the half line $x \ge…

Analysis of PDEs · Mathematics 2025-12-08 Iryna Karpenko , Dmitry Shepelsky

The initial-boundary value problem (IBVP) for the Maxwell-Bloch equations with an arbitrary inhomogeneous broadening and periodic boundary condition is studied. This IBVP describes the propagation of an electromagnetic wave generated by…

Dynamical Systems · Mathematics 2023-12-14 Maria Filipkovska

This paper presents an approach to study initial-boundary value (IBV) problems for integrable nonlinear differential-difference equations (DDEs) posed on a graph. As an illustrative example, we consider the Ablowitz-Ladik system posed on a…

Exactly Solvable and Integrable Systems · Physics 2020-01-08 Baoqiang Xia

We study the Schwartz class of initial-boundary value (IBV) problems for the integrable Fokas-Lenells equation on the half-line via the Deift-Zhou's nonlinear descent method analysis of the corresponding Riemann-Hilbert problem such that…

Exactly Solvable and Integrable Systems · Physics 2017-12-14 Shuyan Chen , Zhenya Yan
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