Mathematics – Spectral Theory
Scientific paper
2010-03-26
Mathematics
Spectral Theory
Scientific paper
In the present paper, we prove an abstract functional analytic criterion for a class of linear partial differential operators acting on a domain $\Omega\subseteq\Bbb R^n$ which are elliptic in the interior to have compact resolvent. This extends known results for magnetic Schr\"{o}dinger operators to more general differential operators. We point out the relationship between the Dirac operator in real dimension two and the $\bar\partial$-Laplacian on a certain weighted space on $\Bbb C$ and we use this connection to prove a non-compactness result for its resolvent.
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