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Accurate approximation in weighted maximum norm by interpolation

โœ Scribed by Ingrid Melinder


Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
472 KB
Volume
22
Category
Article
ISSN
0021-9045

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Norm Approximation by Polynomials in Som
โœ Ali Abkar ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 143 KB

The polynomials are shown to be dense in weighted Bergman spaces in the unit disk whose weights are superbiharmonic and vanish in an average sense at the boundary. This leads to an alternative proof of the Aleman-Richter-Sundberg Beurling-type theorem for zero-based invariant subspaces in the classi