- Tirsdag 18. januar kl. 14:15-16:00 i rom B63

Knut BERG:

Graysons nye bevis av additivitetsteoremetI preprintet http://www.math.uiuc.edu/K-theory/0986/ gir Dan Grayson et nytt bevis for additivitetsteoremet i algebraisk K-teori. Seminaret vil handle om dette nye beviset.

- Tuesday March 22nd at 14:15-16:00 in room B63

Birgit RICHTER (Hamburg):

Brauer groups for commutative S-algebras - Tuesday May 3rd at 14:15-16:00 in room B63

Philip HERMANN (Osnabrueck):

Equivariant Motivic Homotopy Theory - Tuesday June 28th at 14:15-15:15 in the 7th floor common area

Amalendu Krishna (TIFR):

Stacks and their cohomology theories, I - Wednesday June 29th at 14:15-15:15 in the 7th floor common area

Amalendu Krishna (TIFR):

Stacks and their cohomology theories, IIIn this series of two talks, we shall introduce algebraic stacks and discuss some properties and examples. We discuss certain cohomology theories of algebraic stacks such as algebraic K-theory and Chow groups. In the end, we shall present some recent results which relate these two cohomology theories on quotient stacks.

- Monday October 24th 2011 at 12:30-13:30 in room B62

Marco SCHLICHTING (Warwick):

Geometric representation of hermitian K-theory in A^{1}-homotopy theoryWe show that the hermitian K-theory of regular schemes (with 2 a unit in the ring of regular functions) is represented in the A

^{1}-homotopy category of Morel-Voevodsky by the ind-scheme of non-degenerate Grassmanians. - Monday October 31st 2011 at 12:30-13:30 in room B62

John ROGNES:

Infinite cycles in the homological homotopy fixed point spectral sequenceI will go through the simplest case of my 2005 AG&T paper with Bruner, showing that certain classes, in the homological homotopy fixed point spectral sequence for a circle action on a commutative ring spectrum, are infinite cycles. The idea of using an universal example may lead to generalizations for actions by tori or other Lie groups.

- Monday November 7th 2011 at 12:30-13:30 in room B62

John ROGNES:

The homological homotopy fixed point spectral sequence for Lie group actionsI extend my 2005 AG&T paper with Bruner from the circle case to more general Lie groups. There are new results about infinite cycles for actions by the torus T^2 or the rotation group SO(3).

- Monday November 21st 2011

Christian OTTEM (Cambridge):

(See the algebraic geometry seminar page.) - Friday November 25th 2011 at 10:15-12:00 in room B63

Markus SPITZWECK (Regensburg):

On the motivic Eilenberg-Mac Lane spectrum in mixed characteristic