Geodesic
Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order
Matematičeskie zametki, Tome 17 (1975) no. 4, pp. 631-638.

Voir la notice de l'article provenant de la source Math-Net.Ru

A bound is obtained for the multiplicity of the spectrum of the self-adjoint operator generated by a singular ordinary differential operatorell of odd order in the Hubert space $\mathscr L^2(a,b)$ in terms of solutions of the differential equationel $l[y]=\lambda y$. 
@article{MZM_1975_17_4_a14,
     author = {V. I. Filippenko},
     title = {Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order},
     journal = {Matemati\v{c}eskie zametki},
     pages = {631--638},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a14/}
}
TY  - JOUR
AU  - V. I. Filippenko
TI  - Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order
JO  - Matematičeskie zametki
PY  - 1975
SP  - 631
EP  - 638
VL  - 17
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a14/
LA  - ru
ID  - MZM_1975_17_4_a14
ER  - 
%0 Journal Article
%A V. I. Filippenko
%T Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order
%J Matematičeskie zametki
%D 1975
%P 631-638
%V 17
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a14/
%G ru
%F MZM_1975_17_4_a14
V. I. Filippenko. Multiplicity of the spectrum of a~self-adjoint ordinary differential operator of odd order. Matematičeskie zametki, Tome 17 (1975) no. 4, pp. 631-638. http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a14/