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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826 (e) ISSN 0002-9939 (p)
     

Perturbations of the Haar wavelet

Author(s): N. K. Govil; R. A. Zalik
Journal: Proc. Amer. Math. Soc. 125 (1997), 3363-3370.
MSC (1991): Primary 42C99; Secondary 41A05, 46C99
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Abstract: Let $m \in Z^+$ be given. For any $\varepsilon > 0$ we construct a function $f^{\{\varepsilon \}}$ having the following properties: (a) $f^{\{\varepsilon \}}$ has support in $[-\varepsilon , 1 + \varepsilon ]$. (b) $f^{\{\varepsilon \}} \in C^m(-\infty , \infty )$. (c) If $h$ denotes the Haar function and $0<\delta <\infty $, then $\Vert f^{\{\varepsilon \}} - h \Vert _{L^\delta (\mathcal R)} \le (1+2^\delta )^{1/\delta }(2\varepsilon )^{1/\delta }$. (d) $f^{\{\varepsilon \}}$ generates an affine Riesz basis whose frame bounds (which are given explicitly) converge to $1$ as $\varepsilon \rightarrow 0$.


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Additional Information:

N. K. Govil
Affiliation: Department of Mathematics, Auburn University, Auburn, Alabama 36849--5310
Email: govilnk@mail.auburn.edu

R. A. Zalik
Affiliation: Department of Mathematics, Auburn University, Auburn, Alabama 36849--5310
Email: zalik@mail.auburn.edu

DOI: 10.1090/S0002-9939-97-04002-1
PII: S 0002-9939(97)04002-1
Keywords: Frames, affine frames, Riesz bases, Haar wavelet, basis perturbations, $\wedge$-bounded mean variation, cardinal splines
Received by editor(s): March 18, 1996
Received by editor(s) in revised form: June 21, 1996
Additional Notes: The authors are grateful to Ole Christensen, Sergio J. Favier, Christopher E. Heil, and Luis Miguel Pozo Coronado for their helpful comments.
Communicated by: Palle E. T. Jorgensen
Copyright of article: Copyright 1997, American Mathematical Society


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