K. Schmüdgen

activity

19952026

most citedThe multidimensional truncated Moment Problem: Atoms, Determinacy, and Core Variety

30 citations · 93 across the 17 of their papers we have counts for

collaborators

Showing math.OAShow all

3 papers · 1 filter

math.OA2014

Unbounded Operators on Hilbert $C^{*}$ -Modules

René Gebhardt, Konrad Schmüdgen

Let $E$ and $F$ be Hilbert $C^{*}$ -modules over a $C^{*}$ -algebra $\CAlg{A}$. New classes of (possibly unbounded) operators $t : E \to F$ are introduced and investigated. Instead of the d…

math.OA2011★ 7 cited

On $q$ -normal operators and quantum complex plane

Jaka Cimpric, Yurii Savchuk, Konrad Schmüdgen

For $q > 0$ let $\cA$ denote the unital $*$ -algebra with generator $x$ and defining relation $x x^{*} = q x x^{*}$ . Based on this algebra we study $q$ -normal operators, the complex $…

math.OA2009

A noncommutative version of the Fejér-Riesz theorem

Yurii Savchuk, Konrad Schmüdgen

Let $\cX$ be the unital *-algebra generated by the unilateral shift operator. It is shown that for any nonnegative operator $X\in \cX$ there is an element $Y\in \cX$ such that $X=Y…

Unbounded Operators on Hilbert C∗-Modules

On q-normal operators and quantum complex plane

A noncommutative version of the Fejér-Riesz theorem

Unbounded Operators on Hilbert $C^{*}$ -Modules

On $q$ -normal operators and quantum complex plane