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math-ph2017★ 4 cited
Boundary triplets, tensor products and point contacts to reservoirs
A. A. Boitsev, J. F. Brasche, M. M. Malamud +2
We consider symmetric operators of the form where is symmetric and is (in general) unbounded. Such operato…
math-ph2014
Point contacts and boundary triples
Vladimir Lotoreichik, Hagen Neidhardt, Igor Yu. Popov
We suggest an abstract approach for point contact problems in the framework of boundary triples. Using this approach we obtain the perturbation series for a simple eigenvalue in th…