Faculty of Physics
M.V.Lomonosov Moscow State University
Regular Article

# Rayleigh-Schroedinger coefficients for singular perturbations of the discrete spectrum

## V.B. Gostev, A.R. Frenkin

### Moscow University Physics Bulletin 1987. 42. N 6. P. 7

• Article
Annotation

It is shown that the level shift of the even states in the discrete spectrum, produced by the singular perturbation $\lambda |x|^{-\nu}$, can be described by the standard Rayleigh-Schroedinger formulas only for $0 < \nu < 3/2$.

Rissian citation:
В.Б. Гостев, А.Р. Френкин.
Вестн. Моск. ун-та. Сер. 3. Физ. Астрон. 1987. № 6. С. 8.
Authors
V.B. Gostev, A.R. Frenkin
Department of Theoretical Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia

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