Virtual Workshop

Arrangements at Home IV:
Geometry and Topology

June 30 - July 2, 2021


This virtual workshop includes live presentations (using Zoom) complemented by virtual coffee breaks, in the spirit of the Arrangements at Home series during summer 2020. The topics are broadly centered around the geometry and topology of arrangements.


Registration is free but required to attend. Please fill out this registration form if you are interested.

You are also welcome to join us in person in Lugano, Switzerland, June 27 - July 1, 2022! More information available here.

Confirmed Speakers

Marcelo Aguiar (Cornell, US)

Clément Dupont (Montpellier, France)

Michael Falk (Northern Arizona, US)

Nir Gadish (MIT, US)

Roberto Pagaria (Bologna, Italy)

Giovanni Paolini (Caltech/Amazon, US)

Mariel Supina (Berkeley, US)

Tan Nhat Tran (Bochum, Germany)

Akiko Yazawa (Shinshu, Japan)


Times are listed for the central European time zone (UTC+2).

Available abstracts may be found here.

June 30, 2021

13:30-14:00 Virtual Coffee Break

14:00-14:40 Marcelo Aguiar: Lie theory relative to a hyperplane arrangement (slides)

14:50-15:30 Nir Gadish: Möbius inversion in hömotopy theory (slides)

15:30-16:10 Virtual Coffee Break

16:10-16:50 Giovanni Paolini: The K(π,1) conjecture for affine Artin groups (slides)

16:50-17:30 Virtual Coffee Break

July 1, 2021

14:30-14:50 Virtual Coffee Break

14:50-15:30 Tan Nhat Tran: Period collapse in characteristic quasi-polynomials of integral hyperplane arrangements (slides)

15:30-16:10 Virtual Coffee Break

16:10-16:50 Mariel Supina: The universal valuation for Coxeter matroids

16:50-17:30 Virtual Coffee Break

July 2, 2021

13:30-14:00 Virtual Coffee Break

14:00-14:40 Clément Dupont: Mixed Tate extensions from arrangements? (slides)

14:50-15:30 Roberto Pagaria: Hodge theory for polymatroids (slides)

15:30-16:10 Virtual Coffee Break

16:10-16:50 Michael Falk: Orlik-Solomon ideals and 2-isomorphism of hypergraphs

16:50-17:30 Virtual Coffee Break