Oliver Ungermann

most citedL1-determined ideals in group algebras of exponential Lie groups

2 citations · 2 across the 5 of their papers we have counts for

collaborators

6 papers

math.GR2013

Rigidity of lattices and syndetic hulls in solvable Lie groups

Oliver Ungermann

First let $G$ be a completely solvable Lie group. We recall the proof of the following result: Any closed subgroup of $G$ possesses a unique syndetic hull in $G$ . As a consequence…

math.RA2013

The commutant of simple modules over almost commutative algebras

Oliver Ungermann

Let $B$ be a finitely generated algebra over a field $k$ . Then $B$ is called a Jacobson algebra if every semiprime ideal of $B$ is semiprimitive. We will discuss several conditions…

math.SP2013

Spectra of sub-Dirac operators on certain nilmanifolds

Ines Kath, Oliver Ungermann

We study sub-Dirac operators that are associated with left-invariant bracket-generating sub-Riemannian structures on compact quotients of nilpotent semi-direct products $G=\mathbb{…

math.GR2012

Invariant differential operators and central Fourier multipliers on exponential Lie groups

Oliver Ungermann

Let $G$ be an exponential solvable Lie group. By definition $G$ is $*$ -regular if $k e r_{L^{1} (G)} π$ is dense in $k e r_{C^{*} (G)} π$ for all unitary representations $π$ of $G$ . Boid…

math.GR2012★ 2 cited

L1-determined ideals in group algebras of exponential Lie groups

Oliver Ungermann

A locally compact group $G$ is said to be $*$ -regular if the natural map $Ψ:\Prim C^\ast(G)\to\Prim_{\ast} L^1(G)$ is a homeomorphism with respect to the Jacobson topologies on…

math.OA2012

On Glimm's Theorem for almost Hausdorff G-spaces

Oliver Ungermann

We establish a characterization of the well-behaved orbits of a totally Baire $G$ -space of a hereditary Lindelöf locally compact group under a mild assumption of Hausdorffness. Fur…