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Approximation ofp-multiplier Operators via their Spectral Projections

✍ Scribed by Gerd Mockenhaupt; Werner J. Ricker

Publisher: Springer
Year: 2007
Tongue: English
Weight: 280 KB
Volume: 12
Category: Article
ISSN: 1385-1292
DOI: 10.1007/s11117-007-2139-x

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## Abstract Pointwise estimates are obtained for the simultaneous approximation of a function f ϵ__C__^__q__^[‐1,1] and its derivatives f^(1)^, …, f^(q)^ by means of an arbitrary sequence of bounded linear projection operators __L__~__n__~ which map __C__[‐1,1] into the polynomials of degree at mos