Chris Natoli

Online group theory seminars

Due to the coronavirus pandemic, many universities are implementing their seminar talks through online video conferences. Since anyone can attend, I thought it would be helpful to the mathematical community across the us and abroad to aggregate them here. You can also subscribe to a Google Calendar of all these seminars.

As of April 28, this page will no longer be updated, since mathseminars.org is much more comprehensive. Thanks all for visiting.

Upcoming seminars

april 28
tuesday
16:30 cet
(utc+2)

Engel elements in groups of automorphisms of rooted trees

Speaker: Marialaura Noce (University of Bath)

Zoom: link

more info

april 28
tuesday
16:30 cet
(utc+2)

Singularity properties of random free group automorphisms and of random trees in the boundary of Outer space

Speaker: Ilya Kapovich (cuny)

Zoom: link

more info

april 29
wednesday
15:00 bst
(utc+1)

Between Tits buildings and free factor complexes

Speaker: Benjamin Brück (Bielefeld)

Zoom: link

more info

april 30
thursday
5–6pm edt
(utc–4)

Index computations in arithmetic groups

Speaker: Alexander Hulpke (Colorado State University)

Zoom: link, meeting id: 190 519 482

more info

may 1
friday
2pm edt
(utc-4)

Actions of Homeo and Diffeo groups on manifolds

Speaker: Lei Chen (Caltech)

Zoom: to come

more info

may 5
tuesday
16:30 cet
(utc+2)

The joint spectrum and spectral radius of random products of matrices

Speaker: Cagri Sert (University of Zurich)

Zoom: link

more info

may 7
thursday
5-6pm edt
(utc-4)

Action rigidity for free products of hyperbolic manifold groups

Speaker: Emily Stark (University of Utah)

Zoom: link, meeting id: 696 447 067 (email Ilya Kapovich from a university email address for the password)

more info

may 14
thursday
5-6pm edt
(utc-4)

to come

Speaker: Benson Farb (University of Chicago)

Zoom: link, meeting id: 930-9214-0466

more info

june 1–5

Virtual Geometric Group Theory conference

Organizing institution: cirm

more info

Past seminars

march 19
thursday
5–6pm edt
(utc–4)

Deciding if a right-angled Artin group is free-by-free is NP-complete

Speaker: Zoran Sunik (Hofstra University)

Zoom: link, meeting id: 385 634 430 (recording on YouTube, slides)

more info

march 26
thursday
12:30pm cdt
(utc–5)

From sofic groups to $MIP^*=RE$

Speaker: Lewis Bowen

Zoom: link, meeting id: 915 496 893 (recording on YouTube)

more info

march 26
thursday
5–6pm edt
(utc–4)

Quasisymmetry group of the basilica Julia set

Speaker: Sergiy Merenkov (City College of cuny)

Zoom: link, meeting id: 479 396 647 (recording on YouTube)

more info

march 31
tuesday
16:30 cet
(utc+2)

Weakly maximal subgroups of branch groups

Speaker: Paul-Henry Leemann (ens Lyon)

Zoom: link, meeting id: 696 379 617

more info

april 2
thursday
4pm bst
(utc+1)

Computing $k$-th roots in braid groups

Speaker: Maria Cumplido (Heriot-Watt)

Zoom: link, meeting id: 224 687 512

more info

april 2
thursday
12:30pm cdt
(utc-5)

Characteristic measures of symbolic dynamical systems. Joint with Joshua Frisch

Speaker: Omer Tamuz

Zoom: link, meeting id: 777 584 5012 (new id: 662 800 845)

more info

april 2
thursday
2–3pm edt
(utc–4)

Model spaces for relatively hyperbolic pairs

Speaker: Burns Healy (University of Wisconsin-Milwaukee)

Zoom: link (video recording)

more info

april 2
thursday
4–5pm edt
(utc–4)

Buildings, C*-algebras and new higher-dimensional analogues of the Thompson groups

Speaker: Alina Vdovina (University of Newcastle)

Zoom: link, meeting id: 686 861 660 (recording on Youtube, slides)

more info

april 7
tuesday
16:30 cet
(utc+2)

Joint-spectrum, self-similar groups and Schreier graphs

Speaker: Rostislav Grigorchuk (Texas A&M)

Zoom: link

more info

april 8
wednesday
4pm bst
(utc+1)

An analog to the curve complex for Artin groups: generalizing to the FC-type case

Speaker: Rose Morris-Wright (Brandeis)

Zoom: link, meeting id: 826 667 917, password: 607189

more info

april 9
thursday
5–6pm edt
(utc–4)

Coarse computabilty and the Hausdorff distance between Turing degrees. (How even more geometric group theory invaded the theory of computability.)

Speaker: Paul Schupp (University of Illinois at Urbana-Champaign)

Zoom: link, meeting id: 542 955 793 (email Ilya Kapovich from a university email address for the password) (recording on YouTube, slides)

more info

april 10
friday
2pm edt
(utc-4)

Random walks on punctured convex real projective surfaces

Speaker: Harrison Bray (University of Michigan)

Zoom: link (password shared on mailing list)

more info

april 16
thursday
3pm edt
(utc-4)

Circumcenter extension maps for Hadamard manifolds

Speaker: Merlin Incerti-Medici (University of Zurich)

Zoom: link (recording on YouTube)

more info

april 16
thursday
5–6pm edt
(utc-4)

Spectra of Laplacians on Cayley and Schreier graphs

Speaker: Tatiana Smirnova-Nagnibeda (University of Geneva)

Zoom: link, meeting id: 651 394 835 (email Ilya Kapovich from a university email address for the password) (recording on YouTube, slides)

more info

april 22
wednesday
15:00 bst
(utc+1)

Conjugator length

Speaker: Tim Riley (Cornell)

Zoom: link, meeting id: 969 8318 2430, password: 152893

more info

april 23
thursday
5–6pm edt
(utc–4)

Torsion subgroups of groups with cubic Dehn function

Speaker: Frank Wagner (Vanderbilt University)

Zoom: link, meeting id: 452 756 4182 (email Ilya Kapovich from a university email address for the password) (recording on YouTube, slides)

more info

april 24
friday
2:00pm edt
(utc-4)

Some new CAT(0) free-by-cyclic groups

Speaker: Rylee Lyman (Tufts)

Zoom: link (password shared on mailing list)

more info