Nonselfadjoint correct restrictions and extensions with real spectrum
| Subject | Spectral theory |
| Title | Nonselfadjoint correct restrictions and extensions with real spectrum |
| Author(s) | B.N.Biyarov, M. Raikhan |
| Keywords | Correct restriction, Correct extension, Riesz basis |
| Abstract | In this work we obtain sufficient conditions for the reality of the spectrum of some correct restrictions and extensions of operators. It is shown, that the system of eigenvectors forms a Riesz basis in the case of discrete spectrum. |