FB 6 Mathematik/Informatik

Institut für Mathematik

Navigation und Suche der Universität Osnabrück



WS 2017/2018

07.11.2017 um 14:15 Uhr in 69/E15:

Martin Frankland (Universität Osnabrück)

Towards the dual motivic Steenrod algebra in positive characteristic

14.11.2017 um 14:15 Uhr in 69/E15:

Manfred Stelzer (Universität Osnabrück)

Andre-Quillen cohomology and simplicial coalgebras

28.11.2017 um 12:15 Uhr in 69/E15:

Dr. Peter Arndt (Heinrich-Heine-Universität Düsseldorf)

From GAG to NAG: On Durov's and Haran's approaches to F1-geometry

I will give a quick introduction to Durov's "Generalized Algebraic Geometry" (GAG) and Haran's "Non-additive Geometry" (NAG), both of which are generalizations of algebraic geometry in which one glues more general objects than rings. I will present the compactifications of Spec Z that both authors construct. There is an inclusion from Durov's into Haran's F1-schemes, known to both authors. I will construct a left adjoint to this inclusion and compute it for Haran's compactification of Spec Z.

28.11.2017 um 14:15 Uhr in 69/E15:

Dr. Frederico Binda (Universität Regensburg)

Cycles with modulus, regulators and applications

In this talk we will survey some recent results involving the so-called (higher) Chow groups with modulus for a pair (X,D), where X is a smooth variety over a field k and D is a (possibly non reduced) effective Cartier divisor on X, generalizing Bloch-Esnault additive Chow groups studied by Rülling, Park and Krishna as well as the Chow groups of zero cycles with modulus introduced by Kerz and Saito. These groups are a modified version of Bloch's higher Chow groups and are related to several non A1-homotopy invariant objects.
This is a joint work with Shuji Saito.

05.12.2017 um 14:15 Uhr in 69/E15:

Glen M. Wilson (Universitetet Oslo)

Motivic homotopy groups of spheres over finite fields

12.12.2017 um 14:15 Uhr in 69/E15:

Paul Arne Østvær (University of Oslo)

Motivic Landweber exact theories and etale cohomology

19.12.2017 um 14:15 Uhr in 69/E15:

Arun Kumar (Universität Osnabrück)

Hermitian K-theory

09.01.2018 um 14:15 Uhr in 69/E15:

Hadrian Heine (Universität Osnabrück)

Infinity categories with duality

16.01.2018 um 14:15 Uhr in 69/E15:

Toan M. Nguyen (Universität Osnabrück)

Orbifold motivic cohomology and K-theory

In this talk, I will discuss about new algebraic invariants for algebraic orbifolds: orbifold motivic cohomology and K-theory. These invariants come out as a consequence of the obstruction bundles and the virtual fundamental classes in Gromov-Witten theory. I will also explain how these invariants relate to motivic cohomology and K-theory of (crepant) resolutions of singularities of the coarse moduli spaces of orbifolds.

23.01.2018 um 14:15 Uhr in 69/E15:

Somayeh Habibi (Institute for Research in Fundamental Sciences, Tehran, Iran)

Motives of fibrations and application to the moduli of G-Shtukas

30.01.2018 um 14:15 Uhr in 69/E15:

Bogdan Gheorghe (Wayne State University, USA)


06.02.2018 um 14:15 Uhr in 69/E15:

Drew Heard (Faculty of Natural Sciences, Haifa, Israel)


13.02.2018 um 14:15 Uhr in 69/E15:

José Carrasquel Vera (Adam Mickiewicz University of Poznań, Poland)