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On lacunae in the spectrum of the three-dimensional periodic Schrödinger operator with a magnetic field. (English. Russian original) Zbl 0844.35074
Russ. Math. Surv. 50, No. 1, 198-199 (1995); translation from Usp. Mat. Nauk 50, No. 1, 195-196 (1995).
The authors state without proofs some results on lacunae in the spectrum of a Schrödinger operator in $$\mathbb{R}^3$$.
##### MSC:
 35P15 Estimates of eigenvalues in context of PDEs 35Q55 NLS equations (nonlinear Schrödinger equations)
##### Keywords:
lacunae in the spectrum
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