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Some bounds for principal frequency. (English) Zbl 0383.35053

MSC:
35P15 Estimates of eigenvalues in context of PDEs
35J10 Schrödinger operator, Schrödinger equation
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References:
[1] Abramowitz M.I.A., Handbook of mathematical functions with formulas, graphs and mathematical tables (1968) · Zbl 0171.38503
[2] DOI: 10.1007/BF02568147 · Zbl 0339.31003
[3] Hardy G. H., Inequalities. (1952)
[4] Polya G., Isoperimetric inequalities in mathematical physics (1951)
[5] DOI: 10.1007/BF01214695 · Zbl 0283.26015
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. It attempts to reflect the references listed in the original paper as accurately as possible without claiming the completeness or perfect precision of the matching.