researchseminars.org

Markus Hausmann (Universität Bonn)
2020-05-18 13:15 - 14:15 UTC | https://researchseminars.org/talk/UCPHAlgTop/1/
Title: Global group laws and the equivariant Quillen theorem (https://researchseminars.org/talk/UCPHAlgTop/1/)
by Markus Hausmann (Universität Bonn) as part of UCPH Algebra/Topology seminar

Abstract
Quillen's theorem that the complex bordism ring carries the universal formal group law is a fundamental result in stable homotopy theory. In this talk I will discuss equivariant versions of this theorem, both over a fixed abelian compact Lie group and in a global equivariant setting.

Jovana Obradovic (Serbian Academy of Sciences and Arts)
2020-06-15 13:15 - 14:15 | https://researchseminars.org/talk/UCPHAlgTop/2/
Title: Combinatorial homotopy theory for operads (https://researchseminars.org/talk/UCPHAlgTop/2/)
by Jovana Obradovic (Serbian Academy of Sciences and Arts) as part of UCPH Algebra/Topology seminar

Abstract
We introduce an explicit combinatorial characterization of the minimal model of the coloured operad encoding non-symmetric operads. In our description, the spaces of operations are defined in terms of hypergraph polytopes and the composition structure generalizes the one of Stasheff's associahedra operad.
