Stefan Wagner

Universitetslektor

Institutionen för matematik och naturvetenskap, Rum J3531

OM MIG

I am an assistant professor in mathematics at the department of mathematics and natural sciences at BTH.

My research mainly revolves around finding suitable algebraic analogs of useful concepts and ideas from fibre bundle theory and generalizing the corresponding classical results to the setting of noncommutative geometry. In this context, the notion of a free action of a quantum group on a C*-algebra is of particular interest and provides a natural framework for noncommutative principal bundles.

Furthermore, I am interested in noncommutative algebra, especially in epsilon-strongly graded rings which have recently been introduced by Nystedt, Öinert, and Pinedo. The later objects are a generalization of free coactions of complex group rings and, as such, of noncommutative principal bundles.

Projekt och publikationer

Nyligen publicerat
Kay Schwieger, Stefan Wagner, "Noncommutative coverings of quantum tori", Mathematica Scandinavica, ISSN 0025-5521, EISSN 1903-1807, Vol. 126, nr 1, pp. 99 - 116, Mathematica Scandinavica, 2020
Stefan Wagner, "SECONDARY CHARACTERISTIC CLASSES OF LIE ALGEBRA EXTENSIONS", Bulletin de la Société Mathématique de France, ISSN 0037-9484, EISSN 2102-622X, Vol. 147, nr 3, pp. 443 - 453, FRENCH MATHEMATICAL SOC, 2019
Stefan Wagner, "Extending characters of fixed point algebras", Axioms, ISSN 2075-1680, Vol. 7, nr 4, MDPI AG, 2018
Kay Schwieger, Stefan Wagner, "Part III, Free Actions of Compact Quantum Groups on C*-Algebras", SIGMA. Symmetry, Integrability and Geometry, ISSN 1815-0659, EISSN 1815-0659, Vol. 13, NATL ACAD SCI UKRAINE, INST MATH, 2017