Valeria Banica, Nicolas Burq
Published 2023-02-03Version 1
Smooth hypoellipticity for scalar equations is quite well understood presently. On the other hand, much remains to be done for systems and/or at different levels of regularity and in particular for $L^1$-hypoellipticity. In this article we provide some examples and counter-examples.
Quantitative Schauder estimates for hypoelliptic equations
Vanishing Viscosity Limits of Scalar Equations with Degenerate Diffusivity
Counter-examples to the Strichartz estimates for the wave equation in domains II
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