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

19 May 2017,
13:1514:15
Hyperbolicity of moduli spaces of abelian varieties
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19 May 2017,
13:15
PhD Defense Adam Lund
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17 May 2017,
15:1516:15
Seminar talk given by Rasmus Bentmann (University of Göttingen): "
Correspondences out of graph C*algebras"
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17 May 2017,
14:15
Specialeforsvar ved Michael Skibsted
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16 May 2017,
11:15
Specialeforsvar ved Nicholas Gauguin HoughtonLarsen
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15 May 2017,
15:1516:15
Title: Motivic Homotopy Theory over deeper bases
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15 May 2017,
12:45
Speaker: Yiannis N. Petridis (UCL/UCPH). Title: Arithmetic Statistics of Modular Symbols.
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11 May 2017,
15:15
Speaker: Sho Tanimoto (UCPH). Title: Zeroloci of Brauer elements on semisimple groups.
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11 May 2017,
14:0015:00
Lecture in Masterclass: Cohomology of arithmetic groups by Alexander Kupers (Copenhagen University). Title: Computing K_8(Z)
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11 May 2017,
11:3012:30
Lecture in Masterclass: Cohomology of arithmetic groups by Alexander Kupers (Copenhagen University). Title: Computing K_8(Z)
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11 May 2017,
10:0011:00
Cohomology of arithmetic groups by Andy Putman (Notre Dame).
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10 May 2017,
11:3012:30
Lecture in Masterclass: Cohomology of arithmetic groups by Bena Tshishiku (Harvard University). Title: Geometric cycles
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10 May 2017,
10:0011:00
Cohomology of arithmetic groups by Andy Putman (Notre Dame). Title: Buildings, duality, and the highdimensional cohomology of arithmetic groups
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9 May 2017,
14:0015:00
Cohomology of arithmetic groups by Orsola Tommasi (Chalmers University of Technology and University of Gothenburg).
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9 May 2017,
11:3012:30
Cohomology of arithmetic groups by Orsola Tommasi (Chalmers University of Technology and University of Gothenburg).
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9 May 2017,
10:0011:00
Cohomology of arithmetic groups by Andy Putman (Notre Dame). Title: Buildings, duality, and the highdimensional cohomology of arithmetic groups.
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8 May  11 May 2017
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.
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8 May 2017,
15:1516:15
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 vastpartly conjecturalprogramme 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 $K_7(F)$.
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8 May 2017,
11:3012:30
Lecture in Masterclass: Cohomology of arithmetic groups by David Sprehn (Copenhagen University). Title: Stable modular cohomology
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8 May 2017,
10:0011:00
Lecture in Masterclass: Cohomology of arithmetic groups by Andy Putman (Notre Dame) Title: Buildings, duality, and the highdimensional 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 BorelSerre bordification, BieriEckmann duality, the structure of the Steinberg module, and the highdimensional cohomology of these groups.
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5 May 2017,
14:15
Specialeforsvar ved Christoffer Larsen
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5 May 2017,
13:15
Søren Hauberg: Diffeomorphisms for Dummies and Augmentations for Awesommies
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5 May 2017,
12:30
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.
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2 May 2017,
15:1516:15
Talk by Joachim Kock (Universitat Autònoma de Barcelona). Title: Decomposition spaces, incidence algebras, and Möbius inversion.
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28 April 2017,
15:1516:00
Sander Kupers will explain what a perfect form is. Perfect forms are special quadratic forms related to sphere packing and algebraic Ktheory.
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