Hypoelliptic estimates for some linear diffusive kinetic equations

Hérau, Frédéric

Journées équations aux dérivées partielles (2010), article no. 9, 13 p.

This note is an announcement of a forthcoming paper [13] in collaboration with K. Pravda-Starov on global hypoelliptic estimates for Fokker-Planck and linear Landau-type operators. Linear Landau-type equations are a class of inhomogeneous kinetic equations with anisotropic diffusion whose study is motivated by the linearization of the Landau equation near the Maxwellian distribution. By introducing a microlocal method by multiplier which can be adapted to various hypoelliptic kinetic equations, we establish optimal global hypoelliptic estimates with loss of $4/3$ derivatives in a Sobolev scale exactly related to the anisotropy of the diffusion.

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