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Geometry, Groups and Dynamics/GEAR Seminar

The talks are listed here alphabetically by speaker’s last name. For a list in chronological order, go to the Illinois Department of Mathematics calendar.
This list is updated at the end of each semester; last update Dec. 15, 2016.

Name/affiliation Title of Talk Date Links

Alessandrini, Daniele
(Heidelberg University)

Introduction to Spectral Networks, Lecture 1

12/8/14

Video
Abstract

Alessandrini, Daniele
(Heidelberg University)

Introduction to Spectral Networks, Lecture 2

12/10/14

Video
Abstract

Alessandrini, Daniele
(Heidelberg University)

Introduction to Spectral Networks, Lecture 3

12/11/14

Video
Abstract

Alexander, Stephanie
(Illinois)

Themes and directions in Alexandrov geometry

11/4/14

Video
Abstract

Aramayona, Javier

(Madrid)

The abelianization of automorphism groups of right-angled Artin groups

12/1/15

Video
Abstract

Athreya, Jayadev

(Illinois)

Homogeneous dynamics and applications to number theory

4/21/15

Video
Abstract

Athreya, Jayadev
(Illinois)

Trajectories on surfaces and moduli spaces: a survey in honor of Miryam Mirzakhani’s Fields medal

9/23/14

Video

Abstract

Bell, Mark

(Illinois)

Finding paths in graphs of triangulations

9/29/15

Video
Abstract

Bell, Mark
(Illinois)

Slowly converging Pseudo-Anosovs

1/26/16

Video
Abstract

Bell, Mark
(Illinois Math)

Polynomial-time Nielsen--Thurston classification

11/15/16

Video
Abstract

Bell, Mark
(University of Warwick)

Planes, Trains & Automorphisms

2/24/15

Video
Abstract

Berg, David
(Illinois)

Characterization of Aleksandrov Spaces of Curvature Bounded Above by Means of the Metric Cauchy-Schwarz Inequality; part II

2/25/16

Video
Abstract

Berg, David
(Illinois)

Characterization of Aleksandrov Spaces of Curvature Bounded Above by Means of the Metric Cauchy-Schwarz Inequality

2/11/16

Video
Abstract

Bernhart, Frank
(Illinois)

Flattening equations for Chromatic Polynomials

2/4/16

Video
Abstract

Bestvina, Mladen

(University of Utah)

Boundaries of (some) Out(Fn)-complexes

4/16/15

Video (unavailable)

Abstract

Bishop, Richard

(Illinois)

Clairaut's theorem and potential mechanics on metric spaces

4/9/15

Video
Abstract

Boca, Florin

(Illinois)

Some statistical properties of digits in continued fractions

9/10/15

Video
Abstract

Bou-Rabee, Khalid

(City College of CUNY)

The topology of local commensurability graphs

10/13/15

Video
Abstract

Bradlow, Steven
(Illinois)

Higgs bundles and flexibility of surface group representations

2/16/16

Video
Abstract

Branco, Lucas
(Oxford University)

Higgs bundles, Lagrangians and mirror symmetry

12/1/16

Video
Abstract

Cantrell, Michael

(University of Illinois at Chicago)

Ergodic Theory and Rigidity of Nilpotent Groups

11/3/15

Video
Abstract

Charette, Virginie
(University of Sherbrooke)

Some symplectic geometry in the 3-d Einstein Universe

3/1/16

Video
Abstract

Chen, Xiuxiong
(Stony Brook)

A Liouville theorem on Kaehler Ricci flat metric in Cn with conical singularities along {0} x Cn-1

2/12/15

Video
Abstract

Clarkson, Corrin
(Indiana University)

Heegaard Floer homology and 3-manifold mutation

3/17/16

Video
Abstract

Clay, Matt
(University of Arkansas)

Stable Commutator Length in Baumslag-Solitar groups

11/13/14

Video
Abstract

Clay, Matthew
(University of Arkansas)

L^2-torsion of free-by-cyclic groups

2/9/16

Video
Abstract

Collier, Brian
(Illinois)

SO(n,n+1) surface group representations

3/15/16

Video (unavailable)
Abstract

Collier, Brian
(Illinois)

A mapping class group invariant parameterization of maximal Sp ( 4, ℝ) representations

2/17/15

Video
Abstract

D'Angelo, John P.

(Illinois)

Proper holomorphic mappings throughout mathematics

11/5/15

Video
(unavailable)
Abstract

Davison, Ben
(Lausanne)

Higgs bundles, character varieties and cohomological Hall algebras

12/4/13

Video
Abstract

Disarlo, Valentina

(Indiana)

Combinatorial rigidity of the arc complex

10/6/15

Video
Abstract

Dowdall, Spencer
(Illinois)

Hyperbolic extensions of free groups

11/11/14

Video
Abstract

Dowdall, Spencer
(Vanderbilt University)

The geometry of hyperbolic free group extensions

4/26/16

Video (unavailable)
Abstract

Dumas, David
(UIC)

Recurrent Weil-Petersson geodesics with non-uniquely ergodic ending laminations

10/14/14

Video
Abstract

Dunfield, Nathan 
(Illinois)

Certifying the Thurston norm via twisted homology

1/29/15

Video
Abstract

Dunfield, Nathan
(Illinois)

Floer homology, group orders, and taut foliations of hyperbolic 3-manifolds

9/8/16

Video
Abstract

Dunfield, Nathan
(Illinois)

A tale of two norms

8/27/15

Video
Abstract

Farb, Benson

(University of Chicago)

How to make predictions in topology (resp. arithmetic) using arithmetic (resp. topology)

10/15/15

Video
Abstract

Filip, Simion
(Harvard)

Hodge theory and its applications in Teichmuller dynamics

10/6/16

Video
Abstract

Fredrickson, Laura

(University of Texas - Austin)

Constructing solutions of Hitchin's equations near the ends of the moduli space

11/17/15

Video
(unavailable)
Abstract

Fuchs, Elena
(Illinois)

Thin Monodromy Groups

1/20/15

Video
Abstract

Goldman, Bill
(University of Maryland)

Three-dimensional affine crystals

9/16/14

Video
Abstract

Goujard, Elise
(Rennes)

Counting closed geodesics on flat surfaces

9/18/14

Video
Abstract

Gultepe, Funde
(Illinois)

Fully irreducible Automorphisms of the Free Group via Dehn twisting in $\sharp_k(S^2 \times S^1)$

1/27/15

Video
Abstract

Gupta, Neha
(Illinois)

The primitivity index function for a free group, and untangling closed curves on surfaces

2/5/15

Video
Abstract

Gur, Alper
(Indiana University)

Hypersurfaces with Central Convex Cross-Sections

10/11/16

Video
Abstract

Guzman, Rosemary
(Illinois)

Extending the $\log (2k-1)$-Theorem

1/28/16

Video
Abstract

Heersink, Byron

(Illinois)

An effective asymptotic result for the Lebesgue measure of the sum-level sets for continued fractions

4/28/15

Video
Abstract

Hoffman, Neil
(Melbourne)

Knot Complement Commensurability

12/17/15

Video
Abstract

Horbez, Camille
(Rennes)

The Tits alternative for the automorphism group of a free product

2/19/15

Video
Abstract

Hull, Michael
(UIC)

Acylindrically hyperbolic groups and small cancellation quotients

9/4/14

Video
Abstract

Kapovich, Ilya

(Illinois)

On purely loxodromic actions

9/3/15

Video
Abstract

Kelsey, Gregory
(Bellarmine University)

The horofunction boundary of the lamplighter group

11/17/16

Video
Abstract

Kharlampovich, Olga
(Hunter College of CUNY)

Equations in free associative algebras and group algebras of hyperbolic groups

3/3/16

Video
Abstract

Koberda, Thomas
(University of Virginia)

Mapping class group and right-angled Artin group actions on the circle

3/8/16

Video
Abstract

Kossovskiy, Ilya

(University of Vienna)

Dynamics and Cauchy-Riemann Geometry

10/27/15

Video
Abstract

La Nave, Gabriel

(Illinois)

A new continuity flow of Monge-Ampere type, Gromov-Hausdorff limits and Minimal Model program

4/30/15

Video
Abstract

Lakeland, Grant
(Eastern Illinois University)

Cheeger constants of arithmetic hyperbolic surfaces

2/23/16

Video
Abstract

Leininger, Chris
(Illinois)

Limits of Teichmüller geodesics

1/21/16

Video
Abstract

Leininger, Chris
(Illinois)

Homology and dynamics of pseudo-Anosovs

3/5/15

Video
Abstract

Leininger, Christopher

(Illinois)

Marked length rigidity for NPC Euclidean cone metrics

4/7/15

Video
Abstract

Liu, Chih-Chung
(National Cheng Kung University, Taiwan)

Vortex Moduli Spaces and the Space of Holomorphic Maps

4/7/16

Video
Abstract

Lodha, Yash
(Cornell University)

A new solution to the von Neumann-Day problem for finitely presented groups

12/2/14

Video (unavailable)

Abstract

Logares, Marina
(Oxford)

Character Varieties and the Hodge Monodromy Representation

10/25/16

Video
Abstract

Loja Fernandes, Rui

(Illinois)

Poisson manifolds of compact types

9/24/15

Video
Abstract

Loustau, Brice
(Rutgers-Newark)

(Hyper-)Kähler geometry of character varieties

4/14/16

Video (unavailable)
Abstract

Lukyanenko, Anton
(University of Michigan)

Separated nets in the Heisenberg group

4/19/16

Video (unavailable)
Abstract

Lustig, Martin
(Université Aix-Marseille III)

Long turns and the index of irreducible free group automorphisms

11/20/14

Video
Abstract

Malestein, Justin
(Universitat Bonn)

Arithmetic quotients of the mapping class group from covers

10/9/14

Video
Abstract

Miller, Nicholas

(Purdue University)

Arithmetic progressions in the primitive length spectrum

9/8/15

Video
Abstract

Minemyer, Barry
(Ohio State University)

The isometric embedding problem for length metric spaces

11/3/16

Video
Abstract

Minsky, Yair

(Yale University)

Fibrations, subsurfaces and triangulations

11/19/15

Video
Abstract

Modami, Babak
(Illinois)

Recurrent Weil-Petersson geodesics with non-uniquely ergodic ending laminations

10/21/14

Video
Abstract

Movshovich, Yevgenya
(EIU)

On /\-positioning of arcs between parallel support planes

3/29/16

Video (unavailable)
Abstract

Mrowka, Tomasz
(MIT)

Gauge theory for webs and foams

9/1/16

Video
Abstract

Mukamel, Ronen
(Chicago)

Billiards, the square root of eleven and a Teichmuller curve of genus one

12/9/14

Video
Abstract

Myasnikov, Alexei

(Stevens Institute of Technology)

Complexity of finitely generated residually finite groups

4/2/15

Video
Abstract

Neitzke, Andy
(University of Texas at Austin)

Spectral Networks and harmonic maps

8/25/14

Video
Abstract

Oliveira, Andre
(University of Trás-os-Montes e Alto Douro, Vila Real, Portugal)

The singular fibers of the Hitchin map

3/17/15

Video
Abstract

Osin, Denis
(Vanderbilt University)

Induced group actions

4/28/16

Video (unavailable)
Abstract

Pascaleff, James
(Illinois)

How can you have dynamics when all you have is a category?

3/10/15

Video
Abstract

Patel, Priyam
(Purdue University)

Effective separability for hyperbolic surface and 3-manifold groups

10/7/14

Video
Abstract

Pfaff, Catherine
(Bielefeld)

Dense geodesic rays in the quotient of Outer space

3/3/15

Video
Abstract

Pho-On, Witsarut

(Illinois)

Infinite unicorn paths and Gromov boundaries

12/8/15

Video
Abstract

Puder, Doron
(IAS Princeton)

Word Maps and Measure Preservation

3/12/15

Video
Abstract

Rachel Roberts
(Washington University)

Approximating codimension one foliations of 3-manifolds

3/31/15

Video
Abstract

Rafiqi, Ahmad
(Cornell)

Constructing surface homeomorphisms with given stretching factors

1/22/15

Video
Abstract

Rousseau, Jerome
(Universidade Federal da Bahia/Illinois)

Hitting time statistics for observations and application to random dynamical systems

9/30/14

Video
Abstract

Salter, Nick

(University of Chicago)

4-manifolds can be surface bundles over surfaces in many ways

9/22/15

Video
Abstract

Sanders, Andy

(University of Illinois at Chicago)

Complex deformations of Anosov representations

12/3/15

Video
Abstract

Sapir, Jenya
(Illinois)

Counting non-simple closed curves on surfaces

9/2/14

Video
Abstract

Sapir, Mark
(Vanderbilt University)

On the Jones subgroup of Thompson's group

3/19/15

Video
Abstract

Sasaki, Dounnu
(Waseda University, Tokyo)

Subset currents on surface groups

4/12/16

Video (unavailable)
Abstract

Schleimer, Saul
(University of Warwick)

Recognizing three-manifolds

9/1/15

Video
Abstract

Schupp, Paul
(Illinois)

Finitely generated groups with co-c.e. word problem (d'apres Morozov)

4/21/16

Video (unavailable)
Abstract

Shalen, Peter
(University of Illinois at Chicago)

Homology and volume for hyperbolic 3-orbifolds, and enumeration of arithmetic groups

4/5/16

Video
Abstract

Shapiro, Boris
(Stockholm University)

Around Bochner-Krall problem

2/10/15

Video
Abstract

Shin, Hyunshik 
(UIC Math)

Pseudo-Anosov mapping classes not arising from Penner's construction

2/3/15

Video
Abstract

Shonkwiler, Clayton
(Colorado State University)

The Symplectic Geometry of Polygon Space and How to Use It

11/29/16

Video
Abstract

Sinaei, Zahra

(Northwestern University)

Convergence of harmonic maps

11/12/15

Video
Abstract

Strenner, Balazs
(Wisconsin Math)

Pseudo-Anosov maps arising from Penner’s construction

9/25/14

Video
Abstract

Tang, Robert

(Oklahoma)

Shadows of Teichmueller discs in the curve graph

10/8/15

Video
Abstract

Taylor, Samuel 

(Yale University)

Stability in mapping class groups and right-angled Artin groups

4/14/15

Video
Abstract

Tiozzo, Giulio

(Yale University)

Random walks and random group extensions

9/15/15

Video
Abstract

Toulisse, Jérémy

(University of Southern California)

Hitchin representations in Sp(4,R) and conformally flat space-times

5/3/16

Video (unavailable)
Abstract

Tseng, Jimmy

(University of Bristol)

Simultaneous dense and nondense orbits

5/7/15

Video
Abstract

Tserunyan, Anush

(Illinois)

Probability groups

10/1/15

Video
Abstract

Uyanik, Caglar
(Illinois)

Dynamics of free group automorphisms and a subgroup alternative for Out(F_N)

9/20/16

Video
Abstract

Vega, Carlos

(Saint Louis University)

Null distance on a spacetime

9/17/15

Video
(unavailable)
Abstract

Vinogradov, Ilya
(Bristol)

Directions in Hyperbolic Lattices

9/9/14

Video
Abstract

Watanabe, Yohsuke
(Utah Math)

Local finiteness of the curve complex and tight geodesics

11/6/14

Video

Abstract

Watts, Jordan
(University of Colorado Boulder)

Treating Limits as Colimits and Colimits as Limits ... with Applications!

9/27/16

Video
Abstract

Willis, George
(Newcastle)

Totally Disconnected, Locally Compact Groups

10/30/14

Video
Abstract

Work, Grace
(Illinois)

Gap distribution for saddle connections on the octagon

10/28/14

Video
Abstract

Zhang, Xin

(Illinois)

Gap Distributions in Circle Packings

10/20/15

Video
Abstract

Zharnitsky, Vadim

(Illinois)

Energy growth in discontinuous Hamiltonian systems

10/29/15

Video
Abstract

Zimmer, Andy
(University of Chicago)

Higher rank geometric structures

2/26/15

Video
Abstract