Abstract (EN)

Let u = u(x, v) satisfy the Transport Equation View the MathML source, x∈View the MathML sourceN, v∈View the MathML sourceNwhere f belongs to some space of type Lp(dx ⊗ dμ(v)) (where μ is a positive bounded measure on View the MathML sourceN). We study the resulting regularity of the moment ∝ u(x, v) dμ(v) (in terms of fractional Sobolev spaces, for example). Counter-examples are given in order to test the optimality of our results.