Singular differential operators, defect indices, asymptotic behavior of the spectrum
Subject:
Spectral theory of differential operators
Main publications:
N. F. Valeev, A. Eskermesuly, E. A. Nazirova, “Ob asimptotike reshenii singulyarnogo differentsialnogo uravneniya chetvertogo poryadka s neregulyarnymi koeffitsientami”, Matematicheskii zhurnal (g. Almaty, Kazakhstan), 16:1 (59) (2016), 58–76
N. F. Valeev, A. Eskermesuly, Ya. T. Sultanaev, “Ob indeksakh defekta differentsialnogo operatora s bystro ostsilliruyuschimi koeffitsientami”, Matematicheskie zametki, 100:3 (2016), 465–468
N. F. Valeev, A. Eskermesuly, Ya. T. Sultanaev, “On the Deficiency Index of a Differential Operator with Fast Oscillating Coefficients”, Mat. Zametki, 100:3 (2016), 465–468; Math. Notes, 100:3 (2016), 486–490