期刊论文详细信息
Electronic Journal of Qualitative Theory of Differential Equations | |
On discreteness of spectrum of a second order differential operator | |
Sergey Labovskiy1  | |
[1] Plekhanov Russian University of Economics, Moscow, Russian Federation; | |
关键词: discreteness of spectrum; second order differential operator; | |
DOI : 10.14232/ejqtde.2020.1.52 | |
来源: DOAJ |
【 摘 要 】
A new form of a necessary and sufficient conditions for the discreteness of the spectrum of singular operator $-\frac{1}{\rho(x)}(p(x)u')'$, $-\infty\le a\le x\le b\le+\infty$ is obtained. A simpler proof of the necessity is obtained.
【 授权许可】
Unknown