Abstract
We construct and analyze a stable exponentially fitted numerical scheme for a degenerate parabolic equation in the zero-coupon bond pricing. Introducing weighted Sobolev spaces, we present the Gärding coercivity and the weak maximum principle for the differential solution. The differential problem is discretized by a fitted finite volume element method resolving the degeneration. We derive coercivity of the discrete bilinear form as we also show that the fully discrete system matrix is essentially of positive type which implies the maximum principle for the implicit time stepping. Numerical experiments validate the theoretical results.
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Acknowledgments
The authors are supported by the Sofia University Foundation under Grant No 106/2013. The first author is also supported by the European Social Fund through the Human Resource Development Operational Programme under contract BG051PO001-3.3.06-0052 (2012/2014). The second author is also supported by the Bulgarian National Fund under Project DID 02/37/09.
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Communicated by Josselin Garnier.
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Chernogorova, T., Valkov, R. Analysis of a finite volume element method for a degenerate parabolic equation in the zero-coupon bond pricing. Comp. Appl. Math. 34, 619–646 (2015). https://doi.org/10.1007/s40314-014-0128-9
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DOI: https://doi.org/10.1007/s40314-014-0128-9
Keywords
- Degenerate parabolic equation
- Gärding coercivity
- Finite volume element method
- M-matrix
- Stability
- Convergence