On the Asymptotic Behavior of the First Eigenvalue of a Second-Order Differential Operator with Small Parameter in Higher Derivatives
1976 ◽
Vol 20
(3)
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pp. 599-602
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Basis property of a system of eigenfunctions of a second-order differential operator with involution
2019 ◽
Vol 29
(2)
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pp. 183-196
2006 ◽
Vol 6
(3)
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pp. 269-290
◽
1968 ◽
Vol 19
(2)
◽
pp. 292-292
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Keyword(s):
2021 ◽
2016 ◽