Optimal Sobolev Regularity for Second Order Divergence Elliptic Operators on Domains with Buried Boundary Parts

Joachim Rehberg, Elmar Schrohe

We study the regularity of solutions of elliptic second order boundary value problems on a bounded domain $\hat{I}\text{c◯}$ in ${\mathbb{R}}^3$. The coefficients are not necessarily continuous and…