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Accurate Computation of Mathieu Functions (Paperback): Andrew Peterson, Malcolm Bibby Accurate Computation of Mathieu Functions (Paperback)
Andrew Peterson, Malcolm Bibby
R1,025 Discovery Miles 10 250 Ships in 10 - 15 working days

This lecture presents a modern approach for the computation of Mathieu functions. These functions find application in boundary value analysis such as electromagnetic scattering from elliptic cylinders and flat strips, as well as the analogous acoustic and optical problems, and many other applications in science and engineering. The authors review the traditional approach used for these functions, show its limitations, and provide an alternative "tuned" approach enabling improved accuracy and convergence. The performance of this approach is investigated for a wide range of parameters and machine precision. Examples from electromagnetic scattering are provided for illustration and to show the convergence of the typical series that employ Mathieu functions for boundary value analysis.

An Introduction to the Locally Corrected Nystrom Method (Paperback): Andrew Peterson, Malcolm Bibby An Introduction to the Locally Corrected Nystrom Method (Paperback)
Andrew Peterson, Malcolm Bibby
R1,018 Discovery Miles 10 180 Ships in 10 - 15 working days

This lecture provides a tutorial introduction to the Nystroem and locally-corrected Nystroem methods when used for the numerical solutions of the common integral equations of two-dimensional electromagnetic fields. These equations exhibit kernel singularities that complicate their numerical solution. Classical and generalized Gaussian quadrature rules are reviewed. The traditional Nystroem method is summarized, and applied to the magnetic field equation for illustration. To obtain high order accuracy in the numerical results, the locally-corrected Nystroem method is developed and applied to both the electric field and magnetic field equations. In the presence of target edges, where current or charge density singularities occur, the method must be extended through the use of appropriate singular basis functions and special quadrature rules. This extension is also described. Table of Contents: Introduction / Classical Quadrature Rules / The Classical Nystroem Method / The Locally-Corrected Nystroem Method / Generalized Gaussian Quadrature / LCN Treatment of Edge Singularities

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