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On global smoothness preservation in complex approximation
2002
Annales Polonici Mathematici
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By using the properties of convergence and global smoothness preservation of multivariate Weierstrass singular integrals, we establish multivariate complex Carleman type approximation results with rates. Here the approximants fulfill the global smoothness preservation property. Furthermore Mergelyan's theorem for the unit disc is strengthened by proving the global smoothness preservation property.
doi:10.4064/ap79-3-1
fatcat:gwllkoknfrh7li7bdtqv3hmksi