AN EFFICIENT METHOD FOR COMPUTING HIGHLY OSCILLATORY PHYSICAL OPTICS INTEGRAL

An Efficient Method for Computing Highly Oscillatory Physical Optics Integral

Abstract—In this work, we use the numerical steepest descent path (numerical SDP) method in complex analysis theory to calculate the highly oscillatory physical optics (PO) integral with quadratic phase and amplitude variations on the triangular patch. The Stokes’ phenomenon will occur due to various asymptotic behaviors on different domains. The stationary phase point contributions are careful...

Nonlinear Geometric Optics method based multi-scale numerical schemes for highly-oscillatory transport equations

We introduce a new numerical strategy to solve a class of oscillatory transport PDE models which is able to capture accurately the solutions without numerically resolving the high frequency oscillations in both space and time. Such PDE models arise in semiclassical modeling of quantum dynamics with band-crossings, and other highly oscillatory waves. Our first main idea is to use the nonlinear g...

An Asymptotic Parallel-in-Time Method for Highly Oscillatory PDEs

An efficient method for the numerical solution of functional integral equations

We propose an efficient mesh-less method for functional integral equations. Its convergence analysis has been provided. It is tested via a few numerical experiments which show the efficiency and applicability of the proposed method. Attractive numerical results have been obtained.

An efficient technique for solving systems of integral equations

In this paper, the wavelet method based on the Chebyshev polynomials of the second kind is introduced and used to solve systems of integral equations. Operational matrices of integration, product, and derivative are obtained for the second kind Chebyshev wavelets which will be used to convert the system of integral equations into a system of algebraic equations. Also, the error is analyzed and ...