## On spectral identities for the Schrödinger operator involving a virtual level.(English. Russian original)Zbl 0694.35125

Vestn. Leningr. Univ., Math. 21, No. 2, 96-98 (1988); translation from Vestn. Leningr. Univ., Ser. I 1988, No. 2, 125-127 (1988).
Summary: A series of spectral identities for a two-particle Schrödinger- Hamiltonian in $${\mathbb{R}}^ 3$$ in the presence of a virtual level and eigenvalue at the beginning of the continuous spectrum is obtained.

### MSC:

 35P15 Estimates of eigenvalues in context of PDEs 35J10 Schrödinger operator, Schrödinger equation

### Keywords:

spectral identities; Schrödinger-Hamiltonian; eigenvalue