Hassi Seppo

Publications in Math-Net.Ru

1. On the Unitary Equivalence of the Proper Extensions of a Hermitian Operator and the Weyl Function
   
   Mat. Zametki, 91:2 (2012),  316–320
2. Completeness and Riesz basis property of systems of eigenfunctions and associated functions of Dirac-type operators with boundary conditions depending on the spectral parameter
   
   Mat. Zametki, 79:4 (2006),  636–640
3. Similarity between $J$-Self-Adjoint Sturm–Liouville Operators with Operator Potential and Self-Adjoint Operators
   
   Mat. Zametki, 78:4 (2005),  625–628
4. Completeness Theorems for Dirac-Type Operators with Boundary Conditions of General Form Depending on the Spectral Parameter
   
   Mat. Zametki, 74:2 (2003),  316–320