A sinc-Gaussian solver for general second order discontinuous problems
| Autor: | Mahmoud H. Annaby, R. M. Asharabi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Sinc function
Applied Mathematics Gaussian General Engineering 010103 numerical & computational mathematics Solver 01 natural sciences 010101 applied mathematics symbols.namesake Rate of convergence symbols Applied mathematics 0101 mathematics Complex number Self-adjoint operator Eigenvalues and eigenvectors Mathematics Analytic function |
| Zdroj: | Japan Journal of Industrial and Applied Mathematics. 35:653-668 |
| ISSN: | 1868-937X 0916-7005 |
| Popis: | The sinc-Gaussian sampling operator has become an efficient tool in interpolating entire and analytic functions with appropriate growth properties. It accelerates the rate of convergence and remarkably enhance the slow rate of convergence of the classical sinc method. In this paper we compute the eigenvalues of discontinuous second order boundary-value problems using the sinc-Gaussian sampling technique. The problem is defined in two ways throughout $$[-1,1]$$ and is not in general self adjoint. The boundary and compatibility conditions are assumed to be regular in the sense of Birkhoff to guarantee the existence and discreteness of the eigenvalues, which are in general complex numbers and are not necessarily simple. Numerical examples are worked out with graphical illustrations and comparisons with the classical sinc-technique. |
| Databáze: | OpenAIRE |
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