EPFL Topology Seminar and Reading Group 2023 Fall

 Location: Real World 

For questions about the seminar, please contact the organizer: Victor Roca i Lucio 
 
For question about the reading group, please contact the organizers: Léo Navarro Chafloque and Victor Roca i Lucio 
 
This semester, half of the talks will be seminar talks and half of them will be reading group talks by participant members.
 
 

Program

Date Time Place Title Speaker
19.09.2023 14:00 CET MA C1 596 A panorama of derived geometry. (Reading group) Léo Navarro Chafloque
26.09.2023 14:00 CET MA C1 596 Right-angled Artin groups, minors and de Verdière invariant. (Seminar talk) Ramón Flores, Universidad de Sevilla
03.10.2023 14:00 CET MA C1 596 Seminar talk TBA. Greg Arone, Stockholm University
10.10.2023 14:00 CET MA C1 596 The cotangent complex (Reading group talk) Christina Kapatsori
17.10.2023 14:00 CET MA C1 596
 Seminar talk TBA. Lukas Waas, Heidelberg University
24.10.2023     No event this week.  
31.10.2023 14:00 CET MA C1 596 Knotted families from graspers (Seminar talk) Danica Kosanović, ETH
07.11.2023 14:00 CET MA C1 596 Seminar talk TBA. Juan Omar Gómez, University of Bielefeld
14.11.2023 14:00 CET MA C1 596 Formal moduli problems Victor Roca i Lucio
21.11.2023 14:00 CET MA C1 596 Hilbert and Quot schemes (Reading group talk) Linus Rösler
28.11.2023 14:00 CET MA C1 596 Spectral and derived approaches Sam Lavenir
05.12.2023 14:00 CET MA C1 596
 Seminar talk TBA. Jean Fasel, Université de Grenoble
12.12.2023 14:00 CET MA C1 596 Reading talk group TBA.  
19.12.2023 14:00 CET MA C1 596 Seminar talk TBA. Hugo Pourcelot, University of Florence
         

Reading group : Homotopy theory in algebraic geometry and vice-versa

On one hand, homotopy theoretical tools are becoming essential in algebraic geometry. On the other, algebro-geometrical ideas can provide intuition to some new developments in homotopical/higher algebra. The goal of this reading group is to understand the profound links between these two disciplines. 

 

Abstracts

 

Right-angled Artin groups, minors and de Verdière invariant (Ramón Flores)

In the last years, thorough research has been conducted in order to understand graph properties in terms of group properties of the associated right-angled Artin group (RAAG). These properties should be intrinsic, in the sense that they should not depend on a concrete system of generators of the group. In this talk we will show how to approach some graph properties (as for example planarity or outerplanarity) using as input different bases of the cohomology of the RAAG and the good behaviour of the Colin de Verdière invariant with respect to minors.

 

Knotted families from graspers (Danica Kosanović)

For any smooth manifold M of dimension d≥4 we construct explicit classes in homotopy groups of spaces of embeddings of either an arc or a circle into M, in every degree that is a multiple of d−3, and show that they are detected in the Taylor tower of Goodwillie and Weiss.