A geometric approach to the Littlewood-Paley theory

Details A geometric approach to the Littlewood-Paley theory A geometric approach to the Littlewood-Paley theory

2003-09-29

arxiv.org/abs/math/0309463v1

Mathematics

Analysis of PDEs

Scientific paper

We develop a geometric invariant Littlewood-Paley theory for arbitrary tensors on a compact 2 dimensional manifold. We show that all the important features of the classical LP theory survive with estimates which depend only on very limited regularity assumptions on the metric. We give invariant descriptions of Sobolev and Besov spaces and prove some sharp product inequalities. This theory has being developed in connection to the work of the authors on the geometry of null hypersurfaces with a finite curvature flux condition, see \cite{KR1}, \cite{KR3}. We are confident however that it can be applied, and extended, to many different situations.

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