a1 Departamento de Ecuaciones Funcionales, Facultad de Matematicas, Universidad Complutense, Madrid 3, Spain
a2 Department of Mathematics, University of Maryland, College Park, MD 20742, U.S.A. and Département de Mathématiques, Université de Nancy I, BP 239-54506 Vandoeuvre-Cedex, France
Synopsis
We give some results on existence and uniqueness for the solution of elliptic boundary value problems of type

when the βi are not necessarily smooth.
(Received July 31 1984)