Sharp L^p-L^q estimates for the spherical harmonic projection
classification
🧮 math.CA
keywords
estimatesciteharmonicprojectionsharpsphericalapplicationbounds
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We consider $L^p$-$L^q$ estimates for the spherical harmonic projection operators and obtain sharp bounds on a certain range of $p$, $q$. As an application, we provide a proof of off-diagonal Carleman estimates for the Laplacian, which extends the earlier results due to Jerison and Kenig \cite{JK}, and Stein \cite{St-append}.
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