Strichartz estimates for the wave equation on flat cones

Details Strichartz estimates for the wave equation on flat cones Strichartz estimates for the wave equation on flat cones

2011-05-26

arxiv.org/abs/1105.5410v1

Mathematics

Analysis of PDEs

24 pages, 1 figure. Submitted

Scientific paper

We consider the solution operator for the wave equation on the flat Euclidean cone over the circle of radius $\rho > 0$, the manifold $\mathbb{R}_+ \times \mathbb{R} / 2 \pi \rho \mathbb{Z}$ equipped with the metric $\g(r,\theta) = dr^2 + r^2 d\theta^2$. Using explicit representations of the solution operator in regions related to flat wave propagation and diffraction by the cone point, we prove dispersive estimates and hence scale invariant Strichartz estimates for the wave equation on flat cones. We then show that this yields corresponding inequalities on wedge domains, polygons, and Euclidean surfaces with conic singularities. This in turn yields well-posedness results for the nonlinear wave equation on such manifolds. Morawetz estimates on the cone are also treated.

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