Abstract
We extend some remarkable recent results of Lubinsky and Levin-Lubinsky from [−1, 1] to allow discrete eigenvalues outside σ ess and to allow σ ess first to be a finite union of closed intervals and then a fairly general compact set in ℝ (one which is regular for the Dirichlet problem).
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Supported in part by NSF grant DMS-0140592 and U.S.-Israel Binational Science Foundation (BSF) Grant No. 2002068.
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Simon, B. Two extensions of Lubinsky’s universality theorem. J Anal Math 105, 345–362 (2008). https://doi.org/10.1007/s11854-008-0039-z
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DOI: https://doi.org/10.1007/s11854-008-0039-z