103 citations · 129 across the 29 of their papers we have counts for
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math.FA2010★ 1 cited
Truncated moment problems in the class of generalized Nevanlinna functions
Vladimir Derkach, Seppo Hassi, Henk de Snoo
Truncated moment problems in the class of generalized Nevanlinna functions are investigated. General solvability criteria will be established, covering both the even and odd proble…
math.FA2010★ 5 cited
On J-Self-Adjoint Operators with Stable C-Symmetry
Seppo Hassi, Sergii Kuzhel
The paper is devoted to a development of the theory of self-adjoint operators in Krein spaces (J-self-adjoint operators) involving some additional properties arising from the exist…