Résumé
We study:<br /><br />1) local regularity of solutions to nonlinear elliptic PDEs with right-hand side measures<br /><br />2) finite volumes numerical schemes for elliptic equations with right-hand having little regularity<br /><br />3) the approximation, by its parabolic regularization, of a scalar conservation law with boundary conditions<br /><br />4) PDEs involving non-local operator (fractionnal laplacian).