181 citations · 771 across the 48 of their papers we have counts for
4 papers · 1 filter
Boundary pairs associated with quadratic forms
Olaf Post
We introduce an abstract framework for elliptic boundary value problems in a variational form. Given a non-negative quadratic form in a Hilbert space, a boundary pair consists of a…
Path integrals and the essential self-adjointness of differential operators on noncompact manifolds
Batu Güneysu, Olaf Post
We consider Schrödinger operators on possibly noncompact Riemannian manifolds, acting on sections in vector bundles, with locally square integrable potentials whose negative part i…
A general approximation of quantum graph vertex couplings by scaled Schroedinger operators on thin branched manifolds
Pavel Exner, Olaf Post
We demonstrate that any self-adjoint coupling in a quantum graph vertex can be approximated by a family of magnetic Schroedinger operators on a tubular network built over the graph…
On Open Scattering Channels for Manifolds with Ends
Rainer Hempel, Olaf Post, Ricardo Weder
In the framework of time-dependent geometric scattering theory, we study the existence and completeness of the wave operators for perturbations of the Riemannian metric for the Lap…