Weighted norm inequalities, Gaussian bounds and sharp spectral multipliers

Details Weighted norm inequalities, Gaussian bounds and sharp spectral multipliers Weighted norm inequalities, Gaussian bounds and sharp spectral multipliers

2010-03-09

arxiv.org/abs/1003.1831v3

Mathematics

Functional Analysis

Scientific paper

Let $L$ be a non-negative self adjoint operator acting on $L^2(X)$ where $X$ is a space of homogeneous type. Assume that $L$ generates a holomorphic semigroup $e^{-tL}$ whose kernels $p_t(x,y)$ have Gaussian upper bounds but possess no regularity in variables $x$ and $y$. In this article, we study weighted $L^p$-norm inequalities for spectral multipliers of $L$. We show sharp weighted H\"ormander-type spectral multiplier theorems follow from Gaussian heat kernel bounds and appropriate $L^2$ estimates of the kernels of the spectral multipliers. These results are applicable to spectral multipliers for large classes of operators including Laplace operators acting on Lie groups of polynomial growth or irregular non-doubling domains of Euclidean spaces, elliptic operators on compact manifolds and Schr\"odinger operators with non-negative potentials on complete Riemannian manifolds.

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