Global Approximation Results
inverse inequalities for polynomials concerning summability and differentiability;
error estimates for the truncation error u — P N u,where P N u denotes the truncated “Fourier” series of u;
existence, uniqueness and error estimates for the polynomials of best approximation in L P or Sobolev norms;
error estimates for the interpolation error u — I N u,where I N u denotes the polynomial interpolating u at a selected set of points in the domain.
KeywordsTruncation Error Jacobi Polynomial Interpolation Error Interpolation Operator Sobolev Norm
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