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On Kolmogorov equations for anisotropic multivariate Lévy processes

by N. Reich and Ch. Schwab and C. Winter

(Report number 2008-03)

Abstract
For d-dimensional exponential Lévy models, variational formulations of the Kolmogorov equations arising in asset pricing are derived. Well-posedness of these equations is verified. Particular attention is paid to pure jump, d variate Lévy processes built from parametric, copula dependence models in their jump structure. The domains of the associated Dirichlet forms are shown to be certain anisotropic Sobolev spaces. Representations of the Dirichlet forms are given which remain bounded for piecewise polynomial, continuous functions of finite element type. We prove that the variational problem can be localized to a bounded domain with explicit localization error bounds. Furthermore, we collect several analytical tools for further numerical analysis.

Keywords: Lévy-copulas, Lévy processes, integrodifferential equations, pseudo differential operators, Dirichlet forms, option pricing

@Techreport{RSW08_369,
  author = {N. Reich and Ch. Schwab and C. Winter},
  title = {On Kolmogorov equations for anisotropic multivariate Lévy processes},
  institution = {Seminar for Applied Mathematics, ETH Z{\"u}rich},
  number = {2008-03},
  address = {Switzerland},
  url = {https://www.sam.math.ethz.ch/sam_reports/reports_final/reports2008/2008-03.pdf },
  year = {2008}
}

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