Abstract
This paper deals with the collocation method applied to solve systems of singular linear ordinary differential equations with variable coefficient matrices and nonsmooth inhomogeneities. The classical stage convergence order is shown to hold for the piecewise polynomial collocation applied to boundary value problems with time singularities of the first kind provided that their solutions are appropriately smooth. The convergence theory is illustrated by numerical examples.
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Notes
For technical reasons the mesh is restricted to \(u_k<1\) and \(u_{k+1}:=1\).
\(V=16.41619116478355\), \(D_0=0.00008333333333333334\), \(G_0=6.221834927724428\).
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Acknowledgements
We wish to thank M.Sc. Michael Hubner and M.Sc. Stefan Wurm, Vienna University of Technology, for the numerical simulations.
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Communicated by Ralf Hiptmair.
The first two authors gratefully acknowledge support received from the Grant No. 14-06958S of the Grant Agency of the Czech Republic.
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Burkotová, J., Rachůnková, I. & Weinmüller, E.B. On singular BVPs with nonsmooth data: convergence of the collocation schemes. Bit Numer Math 57, 1153–1184 (2017). https://doi.org/10.1007/s10543-017-0686-5
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DOI: https://doi.org/10.1007/s10543-017-0686-5
Keywords
- Linear systems of ordinary differential equations
- Singular boundary value problems
- Time singularity of the first kind
- Nonsmooth inhomogeneity
- Collocation method
- Convergence