J. Brasche

activity

20052017

most citedBoundary triplets, tensor products and point contacts to reservoirs

4 citations · 4 across the 2 of their papers we have counts for

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math-ph2017

Approximation of eigenvalues of Schrödinger operators

Johannes F. Brasche, Robert Fulsche

It is known that convergence of l.s.b. closed symmetric sesquilinear forms implies norm resolvent convergence of the associated self-adjoint operators and this in turn convergence…

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 $S := A \otimes I_{T} + I_{H} \otimes T$ where $A$ is symmetric and $T = T^{*}$ is (in general) unbounded. Such operato…