Archive of Events
http://www.gk1821.uni-freiburg.de
Past events and news of the Graduiertenkolleg 1821 in Freiburg
daily12014-10-10T11:30:05ZSummer 2020: Basic Notions Seminar http://www.gk1821.uni-freiburg.de/event/basicnotions/bn20 Introductory talks to various topics in and around our research areas given by PhD students and postdocs. Advisors are not allowed, to encourage more so-called stupid questions.No publisherfabianBasic Notions Seminar2020-05-14T11:03:53ZEventLecture Series "Triangulated categories of motivic sheaves", 25-28 February 2020, Universität Freiburg http://www.gk1821.uni-freiburg.de/event/lecture%20series Cohomology theories in algebraic geometry do not come alone, but with
associated "sheaf theories" and a rich functoriality with respect to
morphisms of schemes ("six operation formalism"). The archetypal
example is the theory of étale and l-adic sheaves developed in SGA4-5,
which has been adapted to many other settings (analytic sheaves,
D-modules, etc.) Thanks to the work of Voevodsky and his successors,
we now have a theory of triangulated categories of étale motivic
sheaves which generalises the theory of étale sheaves and is, in some
sense, the universal such (triangulated) sheaf theory. Surprisingly,
morphism groups in these categories are related to algebraic cycles.
In this course, I will first explain the construction of these
categories and develop their functoriality. I will then describe some
of the related conjectures which promise tannakian insights into the
structure of algebraic cycles, and I will end with the particular case
of 1-motivic sheaves, coming from relative curves, where everything is
well-understood.No publisherbrunnerLecture Series2020-01-14T09:28:05ZEventSummer School "Special Holonomy – Geometry and Physics", September 23 – 27, 2019, Freiburg http://www.gk1821.uni-freiburg.de/event/summerschool/2019 No publisherbrunnerSummer Schools2019-09-27T08:49:59ZEventSommer School "o-Minimal Structures in Algebraic Geometry", September 9-13, 2019 Freiburg http://www.gk1821.uni-freiburg.de/event/summerschool/omin19 Originating in model theory, o-minimality is a tameness property of real sets which enjoys important finiteness properties. O-minimal structures have recently found a number of important applications to algebraic and arithmetic geometry. The aim of this summer school is to provide an introduction to these ideas for an audience of non-experts.No publisherbrunnerSummer Schools2019-03-06T14:12:18ZEventDarmstadt-Erlangen-Freiburg Seminar on Conformal Field theory, Friday, July 5, 2019 Institut für Mathematik Albert-Ludwigs-Universität Freiburg http://www.gk1821.uni-freiburg.de/event/DEFCFT19 No publisherbrunnerSpecial Event2019-03-15T11:00:59ZEventLecture Series "Hypoelliptic laplacian and applications", 20-24 May 2019, Universität Freiburg http://www.gk1821.uni-freiburg.de/event/bismut The purpose of the lectures is to give an introduction to the hypoelliptic Laplacian and to the results which have been obtained so far by this method.
The hypoelliptic Laplacian gives a universal interpolation between the Laplacian and the generator of the geodesic flow through a family of hypoelliptic operators acting on a bigger space than the original Laplacian. There are as many hypoelliptic Laplacians as there are Laplacians.
To this deformation of operators corresponds an interpolation of dynamics, that interpolates between Brownian motion, with the most irregular paths possible, and the geodesics which have the most regular trajectories.
Explicit geometric formulas for certain orbital integrals will appear as consequences. These give in arbitrary dimensions the analogues of the geometric formula obtained by Selberg in the case of Riemann surfaces.
The lectures are given by Jean-Michel Bismut. Additionally, he will give a Colloquium talk for the general audience. No publisherbrunnerLecture Series2019-05-20T07:35:47ZEventFourth Meeting for Young Women in Mathematics “Cohomological Methods in Geometry” http://www.gk1821.uni-freiburg.de/event/Young_Women_2019 We are hosting a meeting for young women in mathematics at the University of Freiburg as part of our program "Cohomological Methods in Geometry". No publisherbrunnerSpecial Event2019-04-29T09:12:22ZEvent Algebraic and Geometric Aspects in Quantum Field Theory 16-18 April 2019, Universität Freiburg http://www.gk1821.uni-freiburg.de/event/AGAQFT The aim of the meeting is to bring together mathematicians working on Quantum Field Theory from different perspectives through the talks by some of the most known and active international researchers. This event represents an important occasion to review recent achievements and to start fruitful discussions on the open issues and on the directions of future research. No publisherbrunnerWorkshop2019-03-15T09:04:48ZEventThird Meeting for Young Women in Mathematics, February 12-14, 2017 http://www.gk1821.uni-freiburg.de/event/event-folder/Women%20conference%202017/third-meeting-for-young-women-in-mathematics-february-12-14-2017 No publisherbrunnerSpecial Event2017-02-07T08:37:17ZEventWinter 2016/17: Basic Notions Seminar http://www.gk1821.uni-freiburg.de/event/basicnotions/bn1516 Introductory talks given by PhD students and Postdocs; advisors are not allowed, to encourage more stupid questions.No publisherfabianBasic Notions Seminar2020-05-14T07:52:29ZEventSummer School "Coarse Index Theory", September 26-30, 2016 http://www.gk1821.uni-freiburg.de/event/summerschool/Summer_School_2016 No publishergrosseSummer Schools2016-09-23T08:35:29ZEventSummer 2016: Codimension 2 http://www.gk1821.uni-freiburg.de/event/seminar/seminar-codim2 No publisherkonradvoelkelSeminar2016-06-13T07:29:20ZEventLecture Series on Geometric Complexity Theory, March 14-18, 2016 http://www.gk1821.uni-freiburg.de/event/event-folder/complexity-theory Jesko Hüttenhain from TU Berlin will give an introduction to the field of geometric/algebraic complexity theory, an approach to solve problems in theoretical computer science by studying actions of linear groups on algebraic varieties.No publisherkonradvoelkelLecture Series2016-03-08T15:33:34ZEventLecture Series on Transgression and Flows, March 1-10, 2016 http://www.gk1821.uni-freiburg.de/event/event-folder/TransgressionFlow Lectures Series by Prof. Daniel Cibotaru (Fortaleza, Brazil)No publisherflorianbeckLecture Series2016-02-15T12:55:03ZEventBlockseminar of the Graduiertenkolleg 2016 http://www.gk1821.uni-freiburg.de/event/event-folder/blockseminar2016 No publisherkonradvoelkelBlockseminar2016-02-15T13:02:38ZEvent