Solving convection-diffusion equations with mixed, Neumann and Fourier boundary conditions and measures as data, by a duality method

In this paper, we prove, following [1], existence and uniqueness of the solutions of convection-diffusion equations on an open subset of RN, with a measure as data and different boundary conditions: mixed, Neumann or Fourier. The first part is devoted to the proof of regularity results for solutions of convection-diffusion equations with these boundary conditions and data in (W1,q(Ω))', when $q <N/(N-1)$. The second part transforms, thanks to a duality trick, these regularity results into existence and uniqueness results when the data are measures.