Fast Computation of Volume Potentials by Approximate Approximations
Language: English
Published by Springer, 2025
- Softcover
- New
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- Title
- Fast Computation of Volume Potentials by Approximate Approximations
- Author
- Lanzara, Flavia; Maz'Ya, Vladimir; Schmidt, Gunther
- Publisher
- Springer
- Publication year
- 2025
- Condition
- New
- Binding
- Soft cover
- Language
- English
- ISBN 10
- 3031974417
- ISBN 13
- 9783031974410
This book introduces a new fast high-order method for approximating volume potentials and other integral operators with singular kernel. These operators arise naturally in many fields, including physics, chemistry, biology, and financial mathematics. A major impediment to solving real world problems is the so-called curse of dimensionality, where the cubature of these operators requires a computational complexity that grows exponentially in the physical dimension. The development of separated representations has overcome this curse, enabling the treatment of higher-dimensional numerical problems. The method of approximate approximations discussed here provides high-order semi-analytic cubature formulas for many important integral operators of mathematical physics. By using products of Gaussians and special polynomials as basis functions, the action of the integral operators can be written as one-dimensional integrals with a separable integrand. The approximation of a separated representation of the density combined with a suitable quadrature of the one-dimensional integrals leads to a separated approximation of the integral operator. This method is also effective in high-dimensional cases. The book is intended for graduate students and researchers interested in applied approximation theory and numerical methods for solving problems of mathematical physics.
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About the Author
Flavia Lanzara is an associate professor at the Department of Mathematics, University of Rome "La Sapienza" (Italy). Her main research interests are partial differential equations, potential theory, complex analysis, numerical analysis and their applications.
Vladimir Maz’ya is a retired Swedish mathematician of worldwide reputation. The author of more than 500 publications, including 20 research monographs, he strongly influenced the development of mathematical analysis and the theory of partial differential equations, as well as the theory of mesoscale asymptotics and numerical analysis.
Gunther Schmidt is a retired German mathematician from the Weierstrass Institute for Applied Analysis and Stochastics in Berlin. His main research interests have been approximation theory, theoretical and numerical analysis of integral equation and boundary element methods and their application to electromagnetics and optics.
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