Almost periodic pseudodifferential operators and Gevrey classes

Details Almost periodic pseudodifferential operators and Gevrey classes Almost periodic pseudodifferential operators and Gevrey classes

2011-02-22

arxiv.org/abs/1102.4553v1

Mathematics

Functional Analysis

40 pages

Scientific paper

We study almost periodic pseudodifferential operators acting on almost periodic functions $G_{\rm ap}^s(\rr d)$ of Gevrey regularity index $s \geq 1$. We prove that almost periodic operators with symbols of H\"ormander type $S_{\rho,\delta}^m$ satisfying an $s$-Gevrey condition are continuous on $G_{\rm ap}^s(\rr d)$ provided $0 < \rho \leq 1$, $\delta=0$ and $s \rho \geq 1$. A calculus is developed for symbols and operators using a notion of regularizing operator adapted to almost periodic Gevrey functions and its duality. We apply the results to show a regularity result in this context for a class of hypoelliptic operators.

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