Mathematics – Analysis of PDEs
Scientific paper
2009-07-21
Mathematics
Analysis of PDEs
23 pages. Corrections in the proof of prop 3.9
Scientific paper
Doi proved that the $L^2_t H^{1/2}_x$ local smoothing effect for Schr\"odinger equation on a Riemannian manifold does not hold if the geodesic flow has one trapped trajectory. We show in contrast that Strichartz estimates and $L^1\to L^\infty$ dispersive estimates still hold without loss for $e^{it\Delta}$ in various situations where the trapped set is hyperbolic and of sufficiently small fractal dimension.
Burq Nicolas
Guillarmou Colin
Hassell Andrew
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