“…Recently, a lot of progress has been made on the study of the Sobolev regularizing property, cf. [6,11,13,18,19] and references therein, which shows that in some sense the Landau equation can be regarded as a non-linear and non-local analog of the hypo-elliptic Fokker-Planck equation. That means the weak solution, which constructed under rather weak hypothesis on the initial datum, will become smooth or, even more, rapidly decreasing in v at infinity.…”