Extension Theory and Krein-type Resolvent Formulas for Nonsmooth Boundary Value Problems

Helmut Abels, Gerd Grubb, Ian Geoffrey Wood

For a strongly elliptic second-order operator $A$ on a bounded domain $\Omega \subset {\mathbb{R}}^n$ it has been known for many years how to interpret the general closed $L_2(\Omega )$-realizat…