An asymptotic phase for a Sturm-Liouville operator with unbounded potential

An asymptotic phase for a Sturm-Liouville operator with unbounded potential
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Proc. Amer. Math. Soc. 18 (1967), 967-973

DOI: https://doi.org/10.1090/S0002-9939-1967-0224891-3

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References

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