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Adjusted Sparse Tensor Product Spectral Galerkin Method for Solving Pseudodifferential Equations on the Sphere with Random Input Data

  • Duong Thanh PhamEmail author
  • Dinh Dũng
Article
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Abstract

An adjusted sparse tensor product spectral Galerkin approximation method based on spherical harmonics is introduced and analyzed for solving pseudodifferential equations on the sphere with random input data. These equations arise from geodesy where the sphere is taken as a model of the earth. Numerical solutions to the corresponding \(k\)-th order statistical moment equations are found in adjusted sparse tensor approximation spaces which are accordingly designed to the regularity of the data and the equation. Established convergence theorem shows that the adjusted sparse tensor Galerkin discretization is superior not only to the full tensor product but also to the standard sparse tensor counterpart when the statistical moments of the data are of mixed unequal regularity. Numerical experiments illustrate our theoretical results.

Keywords

Stochastic pseudodifferential equations Statistical moments Hyperbolic cross spectral methods Spheres 

Mathematics Subject Classification

65N30 65N15 35R60 41A25 

Notes

Acknowledgements

This research was funded by the Department of Science and Technology–Ho Chi Minh City (HCMC-DOST), and the Institute for Computational Science and Technology (ICST) at Ho Chi Minh city, Vietnam under Contract 21/2017/HD-KHCNTT on 21/09/2017. A part of this paper was done when the authors were visiting the Vietnam Institute for Advanced Study in Mathematics (VIASM). The authors thank VIASM for providing a fruitful research environment and working condition.

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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Institute for Computational Science and TechnologyHo Chi Minh CityVietnam
  2. 2.Vietnamese German UniversityBinh Duong New CityVietnam
  3. 3.Information Technology InstituteVietnam National University, HanoiHanoiVietnam

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