Abstract
We find ground state solutions for the nonlinear Schrödinger equation under conditions weaker than those previously assumed. We allow zero to be in the spectrum.
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Schechter, M. Nonlinear Schrödinger operators with zero in the spectrum. Z. Angew. Math. Phys. 66, 2125–2141 (2015). https://doi.org/10.1007/s00033-015-0511-4
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DOI: https://doi.org/10.1007/s00033-015-0511-4