# Past events – University of Copenhagen

Department of Mathematical Sciences > Calendar > Past events

# Past events

Events at the Department of Mathematical Sciences. Search for certain years or days in the panel below.

## Search events

 All events café debatmøde disputatsforsvar event familieaktivitet fest festival foredrag forelæsning gå-hjem-møde informationsmøde konference konkurrence kulturnatten match-making oplæg ph.d.-forsvar rundvisning seminar sommerskole specialeforsvar specialeseminar symposium tiltrædelsesforelæsning udstilling webinar workshop From To

• 19 May 2017, 13:15-14:15

## Number theory seminar: Yohan Brunebarbe

Hyperbolicity of moduli spaces of abelian varieties

• 19 May 2017, 13:15

• 17 May 2017, 15:15-16:15

## Operator algebra seminar

Seminar talk given by Rasmus Bentmann (University of Göttingen): "
Correspondences out of graph C*-algebras"

• 17 May 2017, 14:15

## Subexponential Distributions

Specialeforsvar ved Michael Skibsted

• 16 May 2017, 11:15

## Cirelson Bounds, Rigidity and Robustness of Non-Local Games

Specialeforsvar ved Nicholas Gauguin Houghton-Larsen

• 15 May 2017, 15:15-16:15

## Algebra/Topology seminar by Peter Arndt

Title: Motivic Homotopy Theory over deeper bases

• 15 May 2017, 12:45

## Joint Number theory/Geometry and Analysis seminar

Speaker: Yiannis N. Petridis (UCL/UCPH). Title: Arithmetic Statistics of Modular Symbols.

• 11 May 2017, 15:15

## Joint Number theory/Geometry and Analysis seminar

Speaker: Sho Tanimoto (UCPH). Title: Zero-loci of Brauer elements on semisimple groups.

• 11 May 2017, 14:00-15:00

## Masterclass Lecture II by Alexander Kupers

Lecture in Masterclass: Cohomology of arithmetic groups by Alexander Kupers (Copenhagen University). Title: Computing K_8(Z)

• 11 May 2017, 11:30-12:30

## Masterclass Lecture I by Alexander Kupers

Lecture in Masterclass: Cohomology of arithmetic groups by Alexander Kupers (Copenhagen University). Title: Computing K_8(Z)

• 11 May 2017, 10:00-11:00

## Masterclass Lecture IV by Andy Putman

Cohomology of arithmetic groups by Andy Putman (Notre Dame).

• 10 May 2017, 11:30-12:30

## Masterclass Lecture by Bena Tshishiku

Lecture in Masterclass: Cohomology of arithmetic groups by Bena Tshishiku (Harvard University). Title: Geometric cycles

• 10 May 2017, 10:00-11:00

## Masterclass Lecture III by Andy Putman

Cohomology of arithmetic groups by Andy Putman (Notre Dame). Title: Buildings, duality, and the high-dimensional cohomology of arithmetic groups

• 9 May 2017, 14:00-15:00

## Masterclass Lecture by Orsola Tommasi II

Cohomology of arithmetic groups by Orsola Tommasi (Chalmers University of Technology and University of Gothenburg).

• 9 May 2017, 11:30-12:30

## Masterclass Lecture I by Orsola Tommasi

Cohomology of arithmetic groups by Orsola Tommasi (Chalmers University of Technology and University of Gothenburg).

• 9 May 2017, 10:00-11:00

## Masterclass Lecture II by Andy Putman

Cohomology of arithmetic groups by Andy Putman (Notre Dame). Title: Buildings, duality, and the high-dimensional cohomology of arithmetic groups.

• 8 May - 11 May 2017

## Masterclass: Cohomology of arithmetic groups

The Masterclass will consist of two lecture series by Andy Putman and Harald Grobner, as well as a number of contributed talks about current research.

• 8 May 2017, 15:15-16:15

## Algebra/Topology Seminar by Herbert Gangl

Talk by Herbert Gangl (Durham University) Title: Zagier's polylogarithm conjecture revisited Abstract: In the early nineties, Goncharov proved the weight 3 case of Zagier's Conjecture stating that the special value $\zeta_F(3)$ of a number field $F$ is essentially expressed as a determinant of trilogarithm values taken in that field. He also envisioned a vast--partly conjectural--programme of how to approach the conjecture for higher weight. We can remove one important obstacle in weight~4 by solving one of Goncharov's conjectures. It further allows us to deduce a functional equation for $Li_4$ in four variables as one expects to enter in a more explicit definition of $K_7(F)$.

• 8 May 2017, 11:30-12:30

## Masterclass Lecture by David Sprehn

Lecture in Masterclass: Cohomology of arithmetic groups by David Sprehn (Copenhagen University). Title: Stable modular cohomology

• 8 May 2017, 10:00-11:00

## Masterclass Lecture by Andy Putman

Lecture in Masterclass: Cohomology of arithmetic groups by Andy Putman (Notre Dame) Title: Buildings, duality, and the high-dimensional cohomology of arithmetic groups Abstract: I will discuss topological results about the cohomology of arithmetic groups, focusing for simplicity on the group SL(n,Z). Topics include the Borel-Serre bordification, Bieri-Eckmann duality, the structure of the Steinberg module, and the high-dimensional cohomology of these groups.

• 5 May 2017, 14:15

## Wind Farm Layout Optimization With Non-Linear Wake effects

Specialeforsvar ved Christoffer Larsen

• 5 May 2017, 13:15

## Seminar in applied mathematics and statistics

Søren Hauberg: Diffeomorphisms for Dummies and Augmentations for Awesommies

• 5 May 2017, 12:30

## Joint Number theory/Geometry and Analysis seminar

Speaker: Henrik Schlichtkrull (UCPH) Title: Asymptotic density of integer points on wavefront spherical spaces Abstract: Given a homogeneous space Z of an algebraic real reductive group Gand an orbit D in Z of a discrete subgroup of G with cofinite volume, and given anincreasing and exhaustive family of compact subsets B_R (called balls) of Z,one wants to determine the expected number of points from D in B_R for large R.For the Euclidean plane Z this is the famous circle problem of Gauss.The talk concerns the solution of this problem, including an error estimate,for a particular family of homogeneous spaces and a geometrically definedfamily of balls.

• 2 May 2017, 15:15-16:15

## Algebra/Topology Seminar by Joachim Kock

Talk by Joachim Kock (Universitat Autònoma de Barcelona). Title: Decomposition spaces, incidence algebras, and Möbius inversion.

• 28 April 2017, 15:15-16:00

## What is a perfect form?

Sander Kupers will explain what a perfect form is. Perfect forms are special quadratic forms related to sphere packing and algebraic K-theory.