Completeness of the system of eigenfunctions of a fractional-order differential operator
2020 ◽
Vol 28
(11)
◽
pp. 1513-1527
◽
2019 ◽
Vol 23
(01)
◽
pp. 1950080
Basis property of a system of eigenfunctions of a second-order differential operator with involution
2019 ◽
Vol 29
(2)
◽
pp. 183-196