Mathematics – Spectral Theory
Scientific paper
2010-12-21
Mathematics
Spectral Theory
40 pages, submitted
Scientific paper
The notion of quasi boundary triples and their Weyl functions is an abstract concept to treat spectral and boundary value problems for elliptic partial differential equations. In the present paper the abstract notion is further developed, and general theorems on resolvent differences belonging to operator ideals are proved. The results are applied to second order elliptic differential operators on bounded and exterior domains, and to partial differential operators with $\delta$ and $\delta'$-potentials supported on hypersurfaces.
Behrndt Jussi
Langer Matthias
Lotoreichik Vladimir
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