Local Hardy Spaces of Differential Forms on Riemannian Manifolds

Details Local Hardy Spaces of Differential Forms on Riemannian Manifolds Local Hardy Spaces of Differential Forms on Riemannian Manifolds

2010-03-31

arxiv.org/abs/1004.0018v2

Mathematics

Differential Geometry

55 pages, 1 figure, minor corrections made for publication

Scientific paper

We define local Hardy spaces of differential forms $h^p_{\mathcal D}(\wedge T^*M)$ for all $p\in[1,\infty]$ that are adapted to a class of first order differential operators $\mathcal D$ on a complete Riemannian manifold $M$ with at most exponential volume growth. In particular, if $D$ is the Hodge--Dirac operator on $M$ and $\Delta=D^2$ is the Hodge--Laplacian, then the local geometric Riesz transform ${D(\Delta+aI)^{-{1}/{2}}}$ has a bounded extension to $h^p_D$ for all $p\in[1,\infty]$, provided that $a>0$ is large enough compared to the exponential growth of $M$. A characterisation of $h^1_{\mathcal D}$ in terms of local molecules is also obtained. These results can be viewed as the localisation of those for the Hardy spaces of differential forms $H^p_D(\wedge T^*M)$ introduced by Auscher, McIntosh and Russ.

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