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Online seminář z algebry - 25.2.2021 PDF Tisk

Další seminář z algebry se koná 25.2.2021 od 13.00 online na platformě ZOOM. Informace pro připojení a další program semináře je zde.

Mike Lieberman

Induced stable independence, with applications

A stable independence relation on a category (a generalization of the model-theoretic notion of nonforking independence!) consists of a very special family of commutative squares, whose members have almost all the desirable properties of pushouts---this is exceedingly useful in categories in which pushouts do not exist.  We describe conditions under which a stable independence notion can be transferred from a  subcategory to a category as a whole, and derive the existence of stable independence notions on a host of categories of groups and modules.  We thereby extend results of Mazari-Armida, who has shown that the categories under consideration are stable in the sense of Galois types. Time permitting, we will also show that, provided the underlying category is locally finitely presentable, the existence of a stable independence relation immediately yields stable independence relations in every finite dimension.  This is joint work with J. Rosický and S. Vasey.

Aktualizováno Úterý, 23 Únor 2021 15:13
41st WINTER SCHOOL GEOMETRY AND PHYSICS Czech Republic (Srni), January 2021 PDF Tisk

Dear friends,
in view of the continuing pandemic the standard arrangement of our winter school is impossible. Finally, we gave up the assumed hybrid form and the 41st event in the row will be run as a ZOOM online meeting in two days only, January 19 and 20, 2021.

The ZOOM meeting will be at same link for both days and I will open it around 1:30pm for checking the screen sharing and possible chat (see more details below):


  • Anton Alekseev (Geneva) - Tuesday 2pm
    The Knizhnik-Zamolodchikov equation and its amazing properties
  • Ugo Boscain (Paris) - Tuesday 3pm
    Quantum confinement for the curvature Laplacian −Delta + c K on 2D-almost-Riemannian manifolds
  • Georgios Dimitroglou Rizell (Uppsala) - Tuesday 4:30pm
    Lagrangian classification and recurrence via pseudoholomorphic foliations.
  • Jean Petitot (Paris) - Wednesday 2pm
    Sub-Riemannian Neurogeometry of the primary visual cortex
  • Frederic Bourgeois ( Paris) - Wednesday 3pm
    An overview of contact homology
  • Dmitri Alekseevsky (Moscow) - Wednesday 4:30pm
    Geometry of rank r= 2 and 3 special Vinberg cones

Short abstracts are available here .

Meeting ID: 849 636 3962
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Jan Slovak
on the behalf of the Organizing Committee

Aktualizováno Pátek, 15 Leden 2021 12:08