| 2020 |
Selfadjoint extensions of relations whose domain and range are orthogonal |
Hassi, S.; Labrousse, J.-Ph.; de Snoo, H.S.V. |
| 2020 |
Spectral Decompositions of Selfadjoint Relations in Pontryagin Spaces and Factorizations of Generalized Nevanlinna Functions |
Hassi, Seppo; Wietsma, Hendrik Luit |
| 2020 |
Generalized boundary triples, I. Some classes of isometric and unitary boundary pairs and realization problems for subclasses of Nevanlinna functions |
Derkach, Volodymyr; Hassi, Seppo; Malamud, Mark |
| 2020 |
A Class of Sectorial Relations and the Associated Closed Forms |
Hassi, Seppo; de Snoo, H. S. V. |
| 2020 |
Operational calculus for rows, columns, and blocks of linear relations |
Hassi, Seppo; Labrousse, Jean-Philippe; de Snoo, Henk |