Organizers

dr hab. Andrzej Weber, prof. UW
dr Krzysztof Ziemiański

Information

Wednesdays, 10:30 a.m. , room: 4070

Home page

http://duch.mimuw.edu.pl/~aweber/STA/

Research fields

Algebraic Topology

List of talks

April 19, 2018, 4:15 p.m.
Andrzej Weber (MIM UW)
Aksjomaty Okounkova charakteryzujące klasy charakterystyczne orbit
Okounkov i Maulik oraz inni autorzy zdefiniowali klasy charakterystyczne osobliwych podrozmaitości w rozmaitościach zespolonych z działaniem torusa w następujących sytuacjach: - na rozmaitości działa grupa algebraiczna, badamy domknięcia orbit z działaniem maksymalnego torusa, - na …
April 12, 2018, 4:15 p.m.
Tomasz Maszczyk (MIMUW)
Milnor idempotents through Toeplitz operators
Geometric generators of the even topological K-theory of a projective space were constructed by Adams. There is also known a noncommutative deformation (aka quantization) of a projective space under which the K-theory doesn't change. We …
April 5, 2018, 4:15 p.m.
Krzysztof Ziemiański (MIMUW - IMPAN)
Components of directed spaces
A directed space is a topological space with a distinguished family ofpaths . Directed spaces are used in computer science as models of concurrent programs. Unfortunately, no satisfactory analogues of classical homotopy invariants of topological …
March 15, 2018, 4:15 p.m.
Jakub Koncki (MIiM UW)
Uogólnione rozmaitości Stiefela
Jan. 25, 2018, 4:15 p.m.
Adam i Witold Bednorz (FUW i MIMUW)
Sphere eversion
60 years after Smale's proof it is still not easy to visualize turning a sphere smoothly inside out. We invite for a journey from history of sphere eversions to modern development and 3D modelling tools.
Jan. 18, 2018, 4:15 p.m.
Agnieszka Bodzenta (MIMUW)
Funktory sferyczne, flopy i sl(2, Z/4)
Jan. 11, 2018, 4:15 p.m.
Andrzej Weber (MIMUW)
Motywiczne klasy charakterystyczne orbit działania grup liniowych
Opowiem o wspólnej pracy z L. Feherem i R. Rimanyim o klasach charakterystycznych w K-teorii dla dziania grupy liniowej na rozmaitości algebraicznej ze skończaoną ilością orbit. Podstawowe przykłady, to przestrzenie jednorodne z działaniem grupy Borela …
Dec. 14, 2017, 4:15 p.m.
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seminarium odwołane
Dec. 7, 2017, 4:15 p.m.
Jan Spaliński (PW)
On the paper ,,Stability of Persistence Diagrams" by D. Cohen-Steiner, H. Edelsbrunner and J. Harer
The goal of the talk is to describe the contents of paper mentioned in the title. This interesting paperaddresses a number of topics. First, it introduces an analogue of a Morse function in the setting …
Nov. 30, 2017, 4:15 p.m.
Magdalena Zielenkiewicz (MIM UW)
N-categories and physics
We will try do explain how n-categories naturally arise as the most convenient framework for modern physics, from quantum mechanics through field theories to quantum gravity.
Nov. 16, 2017, 4:15 p.m.
Krzysztof Ziemiański (MIiM UW)
Directed path spaces via discrete vector fields
Higher Dimensional Automaton is a cubical complex with two distinguished vertices: the initial and the final state and some labeling of vertices. Higher Dimensional Automata are used to model concurrent programs; possible states (respectively possible …
Nov. 9, 2017, 4:15 p.m.
Tomasz Maszczyk (MIiM UW)
Cyclic homotopy Chern character
Oct. 26, 2017, 4:15 p.m.
Bruno Stonek (Université Paris 13)
Topological Hochschild homology of KU
We give different descriptions of the topological Hochschild homology (THH) of the periodic complex topological K-theory ring spectrum KU as a commutative KU-algebra. We also describe the iterated THH of KU.
Oct. 19, 2017, 4:15 p.m.
Andrzej Szczepański (UG)
Intersection forms of almost-flat 4-manifolds
We calculate intersection forms of all 4-dimensional almost-flat manifolds.
Oct. 12, 2017, 4:15 p.m.
Bob Oliver (Université Paris 13)
Automorphisms of fusion systems and p-completed classifying spaces of finite simple groups
https://www.mimuw.edu.pl/~aweber/STA/17.10.12.pdf