Beschreibung:
We study the asymptotic behaviors of the discrete eigenvalue of Schrödinger operatorP(λ)=P0+λVwithP0=-Δ+qθ/r2.We obtain the leading terms of discrete eigenvalues ofP(λ)when the eigenvalues tend to 0. In particular, we obtain the asymptotic behaviors of eigenvalues when(P0−α)−1has singularity atα=0.