The spectrum of a nonselfadjoint second order differential operator on the half-axis, with a complex-valued variable coefficient for the highest derivative
Keyword(s):
2021 ◽
2015 ◽
Basis property of a system of eigenfunctions of a second-order differential operator with involution
2019 ◽
Vol 29
(2)
◽
pp. 183-196
2006 ◽
Vol 6
(3)
◽
pp. 269-290
◽
2016 ◽