Hae
Aineistot 1-8 / 8
Square-integrable solutions and Weyl functions for singular canonical systems
(Vaasan yliopisto, 2010)
- workingPaper
Passive systems with a normal main operator and quasi-selfadjoint systems
(Vaasan yliopisto, 2007)
- workingPaper
Parametrization of contractive block-operator matrices and passive discrete-time systems
(Vaasan yliopisto, 2006)
- workingPaper
Boundary relations and their Weyl families
(Vaasan yliopisto, 2004)
- workingPaper
On Kreǐn's extension theory of non-negative operators
(Vaasan yliopisto, 2002)
- workingPaper
The famous M.G. Kreın’s extension theory of nonnegative operators is being presented in elementary terms, building on the completion of nonnegative operator blocks. The present treatment includes the refinements to the ...
Q-functions of Hermitian contractions of Krein-Ovcharenko type
(Vaasan yliopisto, 2003)
- workingPaper
Operator valued Q-functions of Krein-Ovcharenko type are introduced. Such functions arise from the extension theory of Hermitian contractive operators A in a Hilbert space H. The definition is related to the investigations ...
Singular perturbations of selfadjoint operators
(Vaasan yliopisto, 2002)
- workingPaper
Singular perturbations as range perturbations in a Pontryagin space
(Vaasan yliopisto, 2003)
- workingPaper