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Hyperinterpolations on the Sphere

  • Author / Creator
    Chu,xingming
  • Hyperinterpolation on the unit sphere of the Euclidean space was proposed by Sloan in 1995. But pointwise convergence in the uniform form can not be achieved by hyperinterpolation. Reimer later proposed the generalized hyperinterpolation, which has the advantages that uniform convergence for all continuous functions can be achieved and it requires positive cubature formulas of less precision and hence significantly reduces the cost of computations. However, Reimers technique only allows him to obtain best approximation order result for C1 functions. The main purpose of this thesis is to consider generalized hyperinterpolation of higher order and a best approximation order is obtained. The smoothness of functions is measured in terms of a new K-functional we introduced. Finally, the thesis also collects several useful positive cubature formulas and discusses briefly the construction methods.

  • Subjects / Keywords
  • Graduation date
    2014-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3445HM52
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Mathematical and Statistical Sciences
  • Specialization
    • Mathematics
  • Supervisor / co-supervisor and their department(s)
    • Han,Bin(Department of mathematical and statistical sciences)
    • Dai,Feng(Department of mathematical and statistical sciences)
  • Examining committee members and their departments
    • Zhang, Tong(Department of mathematical and statistical sciences)
    • Han, Bin(Department of mathematical and statistical sciences)
    • Dai, Feng(Department of mathematical and statistical sciences)
    • Yu, xinwei((Department of mathematical and statistical sciences)