Accumulation of complex eigenvalues of an indefinite Sturm-Liouville operator with a shifted Coulomb potential

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• Michael Levitin
• Marcello Seri

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• Primary
• 34B24
• 34L15
• 47E05
• 47B50
• 33C15

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• linear operator pencils
• non-self-adjoint operators
• Sturm-Liouville problem
• Coulomb potential
• complex eigenvalues
• Kummer functions

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