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most citedOn Harrell-Stubbe Type Inequalities for the Discrete Spectrum of a Self-Adjoint Operator

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math.SP2020

Spectral gaps of 1-D Robin Schrödinger operators with single-well potentials

Mark S. Ashbaugh, Derek Kielty

We prove sharp lower bounds on the spectral gap of 1-dimensional Schrödinger operators with Robin boundary conditions for each value of the Robin parameter. In particular, our lowe…