2019 |
Factorized sectorial relations, their maximal-sectorial extensions, and form sums |
Hassi, Seppo; Sandovici, Adrian; de Snoo, Henk |
2019 |
Holomorphic operator-valued functions generated by passive selfadjoint systems |
Arlinskiĭ, Yuri; Hassi, Seppo |
2018 |
Lebesgue type decompositions for linear relations and Ando's uniqueness criterion |
Hassi, Seppo; Sebestyén, Zoltán; de Snoo, Henk |
2018 |
Limit Properties of Eigenvalues in Spectral Gaps |
Hassi, Seppo; de Snoo, Henk; Winkler, Henrik |
2017 |
Limit-point/limit-circle classification for Hain-Lüst type equations |
Hassi, Seppo; Möller, Manfred; de Snoo, Henk |