Variations on a theme of M. G. Kre??n
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Publication:4238177
DOI<link itemprop=identifier href="https://doi.org/10.1002/(SICI)1097-0312(199904)52:4<453::AID-CPA2>3.0.CO;2-R" /><453::AID-CPA2>3.0.CO;2-R 10.1002/(SICI)1097-0312(199904)52:4<453::AID-CPA2>3.0.CO;2-RzbMath0922.34071OpenAlexW1992366771MaRDI QIDQ4238177
Publication date: 19 October 1999
Full work available at URL: https://doi.org/10.1002/(sici)1097-0312(199904)52:4<453::aid-cpa2>3.0.co;2-r
Linear boundary value problems for ordinary differential equations (34B05) Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)
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