Past events – University of Copenhagen

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Symmetry and Deformation > Calendar > Past events

Past events

Events at the Centre for Symmetri and Deformation.

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  • 26 June 2017, 15:15-16:15

    Algebra/Topology Seminar by Arthur Soulie

    Talk by Arthur Soulie (University of Strasbourg) Title: Action of the Long-Moody Construction on Polynomial FunctorsAbstract: In 2015, Randal-Williams and Wahl proved homological stability with certain twisted coefficients for dif- ferent families of groups, in particular the one of braid groups. In fact, they obtain the stability for coefficients given by functors satisfying polynomial conditions. We only know few examples of such functors. Among them, we have the functor given by the unreduced Burau representations. In 1994, Long and Moody gave a construction on representations of braid groups which associates a representation of Bn with a representation of Bn+1. This construction complexifies in a sense the initial representation: for instance, starting from a dimension one representation, one obtains the unreduced Burau representation. In this talk, I will present this construction from a functorial point of view. I will explain that the construction of Long and Moody defines an endofunctor, called the Long-Moody functor, between a suitable category of functors. Then, after defining strong polynomial functors in this context, I will prove that the Long-Moody functor increases by one the degree of strong polynomiality of a strong polynomial functor. Thus, the Long-Moody construction will provide new examples of twisted coefficients corresponding to the framework of Randal-Williams and Wahl. » Read more

  • 26 June - 30 June 2017

    Stable Homotopy Theory and p-adic Hodge Theory

    Masterclass with Matthew Morrow (Jussieu-Paris) and Thomas Nikolaus (MPI Bonn). » Read more

  • 23 June 2017, 13:15

    Homological Identities for Differential Graded Algebras

    Specialeforsvar ved Anne Gregersen » Read more

  • 19 June 2017, 15:15-16:15

    Algebra/Topology Seminar by Alexander Kupers

    Talk by Alexander Kupers (Copenhagen University) Title: Diffeomorphisms of disks Abstract: Disks are arguably the most basic manifolds. I will explain what is known about their diffeomorphisms groups in dimension at least 5, and discuss recent progress in understanding their rational homotopy groups. In particular, I will explain why these are degreewise finitely-generated when n is not 4, 5 or 7. » Read more

  • 16 June 2017, 14:30-15:30

    Science communication for mathematicians

    Talk by Ionica Smeets (Leiden University) » Read more

  • 15 June 2017, 13:15-14:15

    Number Theory Seminar

    Ariyan Javanpeykar (Mainz) will speak about Arithmetic, algebraic, and analytic hyperbolicity. » Read more

  • 14 June 2017, 15:15

    Joint operator algebras & algebra/topology seminar

    Seminar talk by Sarah Browne (University of Sheffield) on An orthogonal quasi-spectrum for graded E-theory. » Read more

  • 13 June 2017, 15:15-16:15

    Harald Bohr Lecture: Peter Sarnak

    Peter Sarnak, Professor at Princeton University & the Institute for Advanced Study, will talk about "Navigating U(2) with Golden Gates" » Read more

  • 12 June 2017, 15:15-16:15

    Algebra/Topology Seminar by Philip Tosteson

    Title: Stability for Singular Configuration Spaces » Read more

  • 7 June 2017, 15:15

    Operator algebras seminar

    Seminar talk by Claire Debord (Clermont-Ferrand) on Blowup and deformation groupoids related to index problems. » Read more

  • 29 May 2017, 15:15-16:15

    Algebra/Topology Seminar by Agnes Beaudry

    Talk by Agnes Beaudry (University of Colorado). » Read more

  • 24 May 2017, 15:15-16:15

    Operator algebra seminar

    Seminar talk given by Elizabeth Gillaspy (University of Muenster):"Wavelets and spectral triples for higher-rank graphs" » Read more

  • 22 May 2017, 15:15-16:15

    Algebra/Topology Seminar by Cristiano Spotti

    Talk by Cristiano Spotti (Aarhus) Title: Explicit degenerations of Kähler-Einstein Fano manifoldsAbstract: I will discuss the problem of studying examples of Gromov-Hausdorff limits of Fano manifolds equipped with Kähler-Einstein metrics, explaining the relevance of these investigations to the existence problem for such metrics in explicit families, as well as to the study of compact moduli of stable Fano varieties. This talk is based on joint work with Song Sun. » Read more

  • 19 May 2017, 14:15-15:15

    Algebra/Topology Seminar by Simona Settepanella

    Talk by Simona Settepanella (Hokkaido University). Title: Intersection lattice of Discriminantal arrangement and hypersurfaces in Grassmannian. » Read more

  • 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" » Read more

  • 15 May 2017, 15:15-16:15

    Algebra/Topology seminar by Peter Arndt

    Title: Motivic Homotopy Theory over deeper bases » Read more

  • 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) » Read more

  • 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) » Read more

  • 11 May 2017, 10:00-11:00

    Masterclass Lecture IV by Andy Putman

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

  • 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 » Read more

  • 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 » Read more

  • 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).  » Read more

  • 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).  » Read more

  • 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. » Read more

  • 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. » Read more

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