# A remark on Krein's resolvent formula and boundary conditions

@inproceedings{Albeverio2005ARO, title={A remark on Krein's resolvent formula and boundary conditions}, author={Sergio Albeverio and Konstantin Pankrashkin}, year={2005} }

We prove an analogue of Krein's resolvent formula expressing the resolvents of self-adjoint extensions in terms of boundary conditions. Applications to quantum graphs and systems with point interactions are discussed.

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