Local solvability of elliptic equations of even order with Hölder coefficients

Abstract

We consider elliptic equations of order 2m with H¨older coefficients. We show local solvability of the Dirichlet problem with m conditions on the boundary of the upper half space. First we consider local solvability in free space and then we treat the boundary case. Our method is based on applying the operator to an approximate solution and iterating in the Holder spaces. A priori estimates for the approximate solution is the essential part of the paper.