# B. Simon

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Articles: 1

### Schrödinger operators with purely discrete spectrum

Barry Simon

Methods Funct. Anal. Topology 15 (2009), no. 1, 61-66

We prove $-\Delta +V$ has purely discrete spectrum if $V\geq 0$ and, for all $M$, $|{\{x\mid V(x) < M\}}|<\infty$ and various extensions.