Abstract
It is well known that the-Walsh-Fourier expansion of a function from the block spaceB q([0,1]), 1<q≤∞, converges pointwise a. e. We prove that the same result is true for the expansion of a function fromB q in certain periodized smooth periodic non-stationary wavelet packets bases based on the Haar filters. We also consider wavelet packets based on the Shannon filters and show that the expansion of Lp-functions, 1<p<∞, converges in norm and pointwise almost everywhere.
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References
Daubechies, I., Ten Lectures on Wavelets, Philadelphia, PA: Society for Industrial and Applied Mathematics (SLAM) 1992
Golubov, B., Efimov, A. and Skvortson, V., Walsh Series and Transforms, Dordrecht: Kluwer Academic Publishers Group, Theory and Applications, Translated from the 1987 Russian Original by W. R. Wade, 1991.
Nielsen Hess, N. and Wickerhauser, M. V., Wavelets and Time-Frequency Analsis, Proceedings of the IEEE, 84:4(1996), 523–540.
Meyer, Y., Wavelets and Operators, Cambridge University Press, 1992.
Nielsen, M., Size Properties of Wavelet Packets, Ph.D. Thesis, Washington University, St. Louis, 1999.
Nielsen, M., Walsh-Type Wavelet Packet Expansions, Appl. Comput. Harmon, Anal., 9:3 (2000), 265–285.
Schipp, F., Wade, W. R. and Simon, P., Walsh Series, Bristol: Adam Hilger Ltd. An Introduction to Dyadic Harmonic Analysis, With the Collaboration of J. Pál, 1990.
Taibleson, N. H. and Weiss, G., Certain Function Spaces Connected With Almost Every-where Convergence of Fourier Series, In: Conference on Harmonic Analysis in Honor of Antoni Zygmund, Vol. 1, I (Chicago, VI., 1981), Berlmont, CA: Wadworth, 1983, 95–113.
Taibleson, M. H. and Wiess, G., Spaces Generated by Blocks, In: Probability Theory and harmonic Analysis (Cleveland, Ohio 1983), New York: Dekker, 1986, 209–226.
Tao, T., On the Almost Everywhere Convergence of Wavelet Summation Methods, Appl. Comput. Harmon. Anal., 3:4(1996), 384–387.
Wickerhauser, M. V., Lectures on Wavelet Packet Algorithms, Technical Report, Washington University, 1991.
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Nielsen, M. On convergence of wavelet packet expansions. Approx. Theory & its Appl. 18, 34–50 (2002). https://doi.org/10.1007/BF02837047
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DOI: https://doi.org/10.1007/BF02837047