A Gaussian estimate for the heat kernel on differential forms and application to the Riesz transform

Details A Gaussian estimate for the heat kernel on differential forms and application to the Riesz transform A Gaussian estimate for the heat kernel on differential forms and application to the Riesz transform

2010-11-23

arxiv.org/abs/1011.5036v2

Mathematics

Differential Geometry

31 pages

Scientific paper

Let $(M^m,g)$ be a m-dimensional complete Riemannian manifold which satisfies the n-Sobolev inequality and on which the volume growth is comparable to the one of $\R^n$ for big balls; if the Hodge Laplacian on 1-forms is strongly positive and the Ricci tensor is in $L^{\frac{n}{2}\pm \epsilon}$ for an $\epsilon>0$, then we prove a Gaussian estimate on the heat kernel of the Hodge Laplacian on 1-forms. This allows us to prove that, under the same hypotheses, the Riesz transform $d\Delta^{-1/2}$ is bounded on $L^p$ for all $1

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