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Besov Spaces and Hausdorff Dimension For Some Carnot-Carathéodory Metric Spaces

Published online by Cambridge University Press:  20 November 2018

Leszek Skrzypczak
Leszek Skrzypczak*
Affiliation:
Faculty of Mathematics and Computer Science, A. Mickiewicz University, Umultowska 871, 61-614 Poznán, Poland, e-mail: [email protected]
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Abstract

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We regard a system of left invariant vector fields $X=\,\{{{X}_{1}},\,\ldots ,\,{{X}_{k}}\}$ satisfying the Hörmander condition and the related Carnot-Carathéodory metric on a unimodular Lie group $G$. We define Besov spaces corresponding to the sub-Laplacian $\Delta \,=\,\sum X_{i}^{2}$ both with positive and negative smoothness. The atomic decomposition of the spaces is given. In consequence we get the distributional characterization of the Hausdorff dimension of Borel subsets with the Haar measure zero.

Keywords

46E3543A1528A78Besov spacessub-elliptic operatorsCarnot-Carathéodory metricHausdorff dimension
Type
Research Article
Information
Canadian Journal of Mathematics , Volume 54 , Issue 6 , 01 December 2002 , pp. 1280 - 1304
Copyright
Copyright © Canadian Mathematical Society 2002

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