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For a wide class of 2D periodic elliptic operators, we show that the global extrema of all spectral band functions are isolated.
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1975
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Kuchment P., Floquet theory for Partial Differential Equations
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Birman M. Sh., Suslina T. A., The two-dimensional periodic magnetic Hamiltonian is absolutely continuous
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Birman M. Sh., Suslina T. A., Two-dimensional periodic Pauli operator. The effective masses at the lower edges of the spectrum
1999
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Birman M. Sh., Suslina T. A., A periodic magnetic Hamiltonian with a variable metric. The problem of absolute continuity
2000
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Klopp F., Ralston J., Endpoints of the spectrum of periodic operators are generically simple
2000
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Kuchment P., The mathematics of photonic crystals
2001
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Kuchment P., Levendorskii S., On the structure of spectra of periodic elliptic operators
2001
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Kuchment P., Pinchover Y., Integral representations and Liouville type theorems for solutions of periodic elliptic equations
Shterenberg R., An example of a periodic magnetic Schrödinger operator with degenerate lower edge of the spectrum
2005
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Shterenberg R., On the structure of the lower spectral edge for a magnetic Schrödinger operator with small magnetic potential
2006
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Kuchment P., Pinchover Y., Liouville theorems and spectral edge behavior on abelian coverings of compact manifolds
2007
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Kuchment P., Raich A., Green’s function asymptotics near the internal edges of spectra of periodic elliptic operators. Spectral edge case
2012
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Hoang V., Radosz M., Absence of bound states for waveguides in 2D periodic structures
2014
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2001
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Van der Waerden B., Algebra: Volume I
2003
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Birman M. Sh., Suslina T. A., Periodic differential operators of second order. Threshold properties and averagings
2004
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Shterenberg R., Absolute continuity of the spectrum of two-dimensional periodic Schrödinger operators with strongly subordinate magnetic potential
2005
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Kuchment P., An overview of periodic elliptic operators
2016
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Kha M., Kuchment P., Raich A., Green’s function asymptotics near the internal edges of spectra of periodic elliptic operators. Spectral gap interior
2017
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Parnovski L., Shterenberg R., Perturbation theory for spectral gap edges of 2D periodic Schrödinger operators
2017
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Kha M., Green’s function asymptotics of periodic elliptic operators on abelian coverings of compact manifolds
2018
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