Date 
Speaker  Seminar  Title 
Friday, September 16, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Cynthia Vinzant U. Michigan 
Combinatorics 
The central curve of a linear program 
Friday, September 23, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
David Speyer U. Michigan 
Combinatorics 
Wiring diagrams and alternating strand diagrams 
Friday, September 30, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Max Glick U. Michigan 
Combinatorics 
On singularity confinement for the pentagram map 
Friday, October 07, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Leonid Petrov Northeastern U. 
Combinatorics 
sl(2) operators and Markov dynamics on branching graphs 
Friday, October 14, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Seungjin Lee U. Michigan 
Combinatorics 
Centrally symmetric polytopes with many faces 
Friday, October 21, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Lionel Levine Cornell U. 
Combinatorics 
Abelian networks 
Friday, October 28, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Shmuel Friedland UIC 
Combinatorics 
On the eigenvalues of graphs: results and conjectures 
Friday, November 04, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Daniele Rosso U. Chicago 
Combinatorics 
Classic and mirabolic RSK correspondence for partial flags 
Friday, November 11, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Thomas Lam U. Michigan 
Combinatorics 
The shape of a random affine Weyl group element, and random core partitions 
Friday, November 18, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Askold Khovanskii U. Toronto 
Combinatorics 
Algebraic and convex geometries 
Friday, December 02, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Cristian Lenart SUNY Albany 
Combinatorics 
The combinatorics of affine crystals and the energy function 
Friday, December 09, 2011 Start: 4:10 PM
Location: 3866 East Hall * 
Sean Keel U. Texas 
Combinatorics 
Mirror symmetry and cluster varieties 
Friday, January 27, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Nathan Reading NCSU 
Combinatorics 
Universal geometric cluster algebras 
Friday, February 03, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Suho Oh University of Michigan 
Combinatorics 
Triangulations of product of simplices 
Friday, February 10, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
John Stembridge University of Michigan 
Combinatorics 
WCells from Scratch 
Friday, February 17, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Ivan Corwin Microsoft and MIT 
Combinatorics 
Tropical combinatorics and Whittaker functions 
Friday, February 24, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Jinho Baik University of Michigan 
Combinatorics 
Maximal crossing and nesting of random matchings 
Friday, March 09, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Svante Linusson KTH 
Combinatorics 
TASEP on a circle with many types of particles 
Friday, March 16, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Reiho Sakamoto Tokyo University of Science 
Combinatorics 
A survey on boxball systems 
Friday, March 23, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Alexander Ellis Columbia University 
Combinatorics 
Odd symmetric functions 
Friday, March 30, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Patricia Hersh NCSU 
Combinatorics 
Symmetric chain decomposition for cyclic quotients of Boolean algebras and relation to cyclic crystals 
Friday, April 06, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
David Perkinson Reed College 
Combinatorics 
The algebraic geometry of sandpiles 
Friday, April 13, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Karola Meszaros University of Michigan 
Combinatorics 
Flow polytopes and the Kostant partition function 
Friday, September 14, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Cynthia Vinzant U. Michigan 
Combinatorics 
Hyperbolic Polynomials, Interlacers, and Sums of Squares 
Friday, September 21, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Jonah Blasiak UM 
Combinatorics 
Kronecker coefficients for one hook shape 
Friday, September 28, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Frank Sottile Texas A&M 
Combinatorics 
An inequality of Kostka numbers and Galois groups of Schubert problems of lines 
Friday, October 05, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Jed Yang UCLA 
Combinatorics 
Tiling simply connected regions with rectangles 
Friday, October 12, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Ricky Liu UM 
Combinatorics 
Subalgebras of the FominKirillov algebra 
Friday, October 19, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
David Speyer U. Michigan 
Combinatorics 
Real Schubert problems, stable curves and tableaux combinatorics 
Friday, October 26, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Zach Hamaker Dartmouth College 
Combinatorics 
Relating EdelmanGreene insertion and the Little map 
Friday, November 02, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Anders Buch Rutgers U 
Combinatorics 
CANCELLED 
Friday, November 09, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Dustin Ross Colorado State U. 
Combinatorics 
The Loop MurnaghanNakayama Rule 
Friday, November 16, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Anders Buch Rutgers U. 
Combinatorics 
The puzzle conjecture for 2step flag manifolds 
Friday, November 30, 2012 Start: 4:10 PM
Location: 3866 East Hall * 
Harm Derksen U. Michigan 
Combinatorics 
The Graph Isomorphism Problem 
Friday, January 18, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Tomoo Matsumura KAIST 
Combinatorics 
(Factorial) Schur functions and weighted Grassmannians 
Friday, February 01, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Andreas Blass University of Michigan 
Combinatorics 
Shelah's bipartite matching algorithm 
Friday, February 08, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Michael Shapiro Michigan State University 
Combinatorics 
Growth rate classification for cluster algebras 
Friday, February 22, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Li Li Oakland University 
Combinatorics 
Positivity and tameness in rank 2 cluster algebras 
Friday, March 01, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Alexander Barvinok University of Michigan 
Combinatorics 
Thrifty approximations of convex bodies by polytopes 
Friday, March 15, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Bruce Sagan Michigan State University 
Combinatorics 
Factoring the characteristic polynomial of a poset 
Friday, March 22, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Michael Chmutov University of Michigan 
Combinatorics 
Type A molecules are of KazhdanLusztig type 
Friday, March 29, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Kevin Carde University of Michigan 
Combinatorics 
Cluster structures on mixed invariant rings, and related combinatorics 
Friday, September 13, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Pablo Soberon U. Michigan 
Combinatorics 
Tverberg's theorem: different approaches to the colorful version 
Friday, September 27, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Nicolas Ford U. Michigan 
Combinatorics 
The Expected Codimension of a Matroid Variety 
Friday, October 04, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Sergey Fomin U. Michigan 
Combinatorics 
Subtractionfree complexity 
Friday, October 11, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Suho Oh U. Michigan 
Combinatorics 
Linear extensions of posets to polytopes 
Friday, October 25, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Shifra Reif U. Michigan 
Combinatorics 
Arc diagrams and characters of Lie superalgebras 
Friday, November 01, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Patricia Hersh NCSU 
Combinatorics 
Regular cell complexes in total positivity 
Friday, November 08, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Ricky Liu U. Michigan 
Combinatorics 
Subalgebras of the FominKirillov algebra: an update 
Friday, November 15, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Jeanne Scott Institute of Mathematical Sciences, Chennai 
Combinatorics 
Twist and Matchings 
Friday, November 22, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Adam Sheffer Tel Aviv 
Combinatorics 
Recent progress in distinct distances problems 
Friday, December 06, 2013 Start: 4:10 PM
Location: 3866 East Hall * 
Andrew Snowden U. Michigan 
Combinatorics 
Stable representation theory 
Friday, January 17, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
John WiltshireGordon U. Michigan 
Combinatorics 
Building vector spaces from sets 
Friday, January 24, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Amy Pang Stanford U. 
Combinatorics 
Card Shuffling and other HopfPower Markov Chains 
Friday, January 31, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Erik Carlsson Stony Brook 
Combinatorics 
q,t Catalan numbers and HallLittlewood polynomials 
Friday, February 07, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Alexander Barvinok UM 
Combinatorics 
On testing Hamiltonicity of graphs 
Friday, February 14, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Greg Muller U. Michigan 
Combinatorics 
Quiver mutation and Postnikov diagrams 
Friday, February 21, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Josh Alman MIT 
Combinatorics 
Positivity Phenomena in Circular Planar Electrical Networks 
Friday, March 14, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Yi Su U. Michigan 
Combinatorics 
Electrical Networks and Electrical Lie algebras of classical Lie type 
Friday, March 21, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Carolina Benedetti Michigan State U. 
Combinatorics 
From weak to strong combinatorial Hopf algebras 
Friday, March 28, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Ilia Itenberg Inst. Math. Jussieu 
Combinatorics 
Hurwitz numbers for real polynomials 
Friday, April 04, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Steven Sam UC Berkeley 
Combinatorics 
Grobner bases for twisted commutative algebras 
Friday, April 11, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
David Speyer U. Michigan 
Combinatorics 
The twist for positroids 
Friday, April 18, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Vadim Gorin MIT 
Combinatorics 
From representations of classical Lie groups to free probability 
Friday, September 05, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Isabella Novik University of Washington 
Combinatorics 
The balanced Lower Bound Theorem and Generalized Lower Bound Conjecture 
Friday, September 12, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Bernd Sturmfels UC Berkeley 
Combinatorics 
Curves in the Tropical Plane 
Friday, September 19, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Anne Schilling UC Davis 
Combinatorics 
Crystal approach to affine Schubert calculus 
Friday, September 26, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Brendon Rhoades UCSD 
Combinatorics 
Parking Spaces 
Friday, October 03, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Syu Kato Kyoto University 
Combinatorics 
An algebraic study of extension algebras and its applications 
Friday, October 17, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Allen Knutson Cornell U. 
Combinatorics 
Schubert calculus and shifting of interval positroid varieties 
Friday, October 24, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Ian Le U. Chicago 
Combinatorics 
Horocycles in Affine Buildings and Tropicalization 
Friday, November 07, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Brendan Pawlowski U. Minnesota 
Combinatorics 
Cohomology classes of rank varieties and a counterexample to a conjecture of Liu 
Friday, November 14, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Thomas Lam U. Michigan 
Combinatorics 
Geometric crystals and Whittaker functions 
Friday, November 21, 2014 Start: 4:10 PM
Location: 3866 East Hall * 
Paul Federbush University of Michigan 
Combinatorics 
New Results and New Conjectures on the MonomerDimer Problem 
Friday, January 16, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
John Stembridge U. Michigan 
Combinatorics 
Generalized stability of Kronecker coefficients 
Friday, January 23, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Andrew Snowden U. Michigan 
Combinatorics 
Two finiteness results in combinatorial commutative algebra 
Friday, January 30, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Pablo Soberon U. Michigan 
Combinatorics 
Fixed directions in mass partitions problems 
Friday, February 06, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Alexander Barvinok U. Michigan 
Combinatorics 
Complex geometry and computational complexity of the permanent 
Friday, February 20, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Nick Early Pennsylvania State 
Combinatorics 
Symmetry and Geometric Structure for the Worpitzky identity 
Friday, February 27, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Alexander Vainshtein U. Haifa 
Combinatorics 
Integrable cluster dynamics of directed networks and pentagram maps 
Friday, March 13, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Leonid Petrov U. Virginia 
Combinatorics 
On a rational deformation of HallLittlewood symmetric polynomials 
Friday, March 20, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Rebecca Patrias U. Minnesota 
Combinatorics 
Dual filtered graphs 
Friday, March 27, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Dylan Allegretti Yale U. 
Combinatorics 
The symplectic double and Fpolynomials 
Friday, April 03, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Melody Chan Harvard U. 
Combinatorics 
Staircase paths, Young tableaux, and BrillNoether curves 
Friday, April 10, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Dominic Searles U. Illinois 
Combinatorics 
Rootsystem combinatorics and Schubert calculus 
Friday, April 17, 2015 Start: 4:10 PM
Location: 3866 East Hall * 
Maria Monks Gillespie U. California at Berkeley 
Combinatorics 
Combinatorics of the q,tsymmetry relation in Macdonald polynomials 
Friday, September 11, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Alexander Garver U. Minnesota 
Combinatorics 
Lattice properties of oriented exchange graphs 
Friday, September 18, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Jose Samper U. Washington 
Combinatorics 
Relaxations of the matroid axioms 
Friday, September 25, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Hugh Thomas University of Quebec at Montreal 
Combinatorics 
Weak order on finite Coxeter groups and representation theory of preprojective algebras 
Friday, October 02, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Rachel Karpman U. Michigan 
Combinatorics 
Total positivity for the Lagrangian Grassmannian 
Friday, October 09, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Michelle Wachs U. Miami 
Combinatorics 
Chromatic quasisymmetric functions 
Friday, October 16, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Masaki Watanabe U. Tokyo 
Combinatorics 
Schubert polynomials and KraskiewiczPragacz modules 
Friday, October 23, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Peter Tingley Loyola U. Chicago 
Combinatorics 
Crystal combinatorics from PBW bases 
Friday, October 30, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Thomas McConville U. Minnesota 
Combinatorics 
Noncrossing tree partitions 
Friday, November 06, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Shira Zerbib U. Michigan 
Combinatorics 
Fractional covers and matchings in families of weighted dintervals 
Friday, November 13, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Noah Snyder Indiana U. 
Combinatorics 
Skein theoretic invariants of planar trivalent graphs 
Friday, November 20, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Chris Fraser U. Michigan 
Combinatorics 
Quasiautomorphisms of Grassmannian cluster algebras and webs 
Friday, December 04, 2015 Start: 3:10 PM
Location: 4088 East Hall * 
Zachary Hamaker U. Minnesota 
Combinatorics 
Involution words  a survey 
Friday, January 08, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Oliver Pechenik U. Illinois (UrbanaChampaign) 
Combinatorics 
Puzzles and equivariant Ktheory of Grassmannians 
Friday, January 22, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Jenna Rajchgot U Michigan 
Combinatorics 
Three combinatorial formulas for type A quiver polynomials and Kpolynomials 
Friday, January 29, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Jake Levinson UM 
Combinatorics 
KTheory and Monodromy of Schubert Curves 
Friday, February 05, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Gregg Musiker U Minnesota 
Combinatorics 
Generalized Snake Graphs for Generalized Cluster Algebras 
Friday, February 12, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Michael Chmutov U Minnesota 
Combinatorics 
Matrix Ball Construction for affine RobinsonSchensted Correspondence 
Friday, February 19, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Steven Karp UC Berkeley 
Combinatorics 
Sign variation, the Grassmannian, and total positivity 
Friday, February 26, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Visu Makam U. Michigan 
Combinatorics 
Polynomial degree bounds for matrix semiinvariants 
Friday, March 11, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Andrew Berget West Washington University 
Combinatorics 
A representation of B_n that restricts to the regular representation of B_{n1}. 
Friday, March 18, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Mihai Ciucu U. Indiana 
Combinatorics 
Lozenge tilings with gaps in a 90 degree wedge domain with mixed boundary conditions 
Friday, March 25, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Emily Barnard NCSU 
Combinatorics 
CoxeterbiCatalan Combinatorics 
Friday, April 01, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
David Speyer U Michigan 
Combinatorics 
Kasteleyn's method and positroids 
Friday, April 08, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Vivek Shende UC Berkeley 
Combinatorics 
Cluster varieties from Legendrian knots 
Friday, September 16, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Sam Payne Yale U. 
Combinatorics 
Moduli spaces of tropical curves and representations of the symmetric group 
Friday, September 30, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Brendan Pawlowski U. Michigan 
Combinatorics 
A representationtheoretic interpretation of positroid classes 
Friday, October 07, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Dylan Thurston Indiana U. 
Combinatorics 
Positivity and canonical bases for surface skein algebras 
Friday, October 14, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
SeungJin Lee KIAS 
Combinatorics 
Combinatorial description of the cohomology of the affine flag variety 
Friday, October 21, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Alexander Barvinok U. Michigan 
Combinatorics 
Complex zeros and computational complexity of partition functions 
Friday, October 28, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Ian Le Perimeter Institute 
Combinatorics 
Cluster Structures on Higher Teichmuller Spaces for Classical Groups 
Friday, November 04, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Elizabeth Milicevic Haverford College 
Combinatorics 
Maximal Newton polygons and the quantum Bruhat graph 
Friday, November 11, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Max Glick U. Connecticut 
Combinatorics 
Discrete solitons in infinite reduced words 
Friday, November 18, 2016 Start: 3:10 PM
Location: 4088 East Hall * 
Qiao Zhou UC Berkeley 
Combinatorics 
Convex polytopes for the central degeneration of the affine Grassmannian 
Friday, January 20, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Balazs Elek Cornell 
Combinatorics 
Pizzas and KazhdanLusztig atlases on toric surfaces 
Friday, January 27, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Gabriel Frieden U. Michigan 
Combinatorics 
A rational lift of the combinatorial Rmatrix 
Friday, February 03, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
David Speyer U. Michigan 
Combinatorics 
Large colored sum free sets in finite vector spaces 
Friday, February 10, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Bo Lin UC Berkeley 
Combinatorics 
Computing Linear Systems on Metric Graphs 
Friday, February 17, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Brendan Pawlowski University of Michigan 
Combinatorics 
Transition formulas and SchurPpositivity for (stable) involution Schubert polynomials 
Friday, March 10, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Allen Knutson Cornell 
Combinatorics 
Schubert puzzles and quantum integrable systems 
Friday, March 17, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Federico Ardila San Francisco State U. 
Combinatorics 
The algebraic and combinatorial structure of generalized permutahedra 
Friday, March 24, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Rachel Karpman Ohio State University 
Combinatorics 
Triangulations, plabic graphs, and Soliton solutions to the KP equation 
Friday, March 31, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Sergei Lando HSE Moscow & OSU 
Combinatorics 
Deltamatroids and Vassiliev invariants 
Friday, April 07, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Stefan Froehlich U. Michigan 
Combinatorics 
Honeycombs and Kronecker products 
Friday, April 14, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Vladimir Retakh Rutgers U. 
Combinatorics 
Noncommutative Catalan numbers 
Friday, April 21, 2017 Start: 3:10 PM
Location: 4088 East Hall * 
Chris Fraser IUPUI 
Combinatorics 
Braid group symmetries of Grassmannian cluster algebras 
Friday, September 08, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Brendon Rhoades UC San Diego 
Combinatorics 
Ordered set partitions, generalized coinvariant algebras, and the Delta Conjecture 
Friday, September 15, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Pavel Galashin MIT 
Combinatorics 
Zamolodchikov periodicity and integrability 
Friday, September 22, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Oliver Pechenik U. Michigan 
Combinatorics 
Decompositions of Grothendieck polynomials 
Friday, September 29, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Alexey Bufetov MIT 
Combinatorics 
HallLittlewood RSK algorithm 
Friday, October 06, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Christin Bibby U. Michigan 
Combinatorics 
A generalization of Dowling lattices 
Friday, October 20, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Anna Weigandt U. Illinois, UrbanaChampaign 
Combinatorics 
Prism Tableaux and Alternating Sign Matrices 
Friday, October 27, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Steven Karp U. Michigan 
Combinatorics 
Topology of totally positive spaces 
Friday, November 03, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Nathan Reading North Carolina State U. 
Combinatorics 
Dominance phenomena: mutation, scattering and cluster algebras 
Friday, November 10, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Benjamin Wyser Oklahoma State U. 
Combinatorics 
Singularities of Korbit closures and interval pattern avoidance 
Friday, November 17, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Hugh Thomas UQAM 
Combinatorics 
RobinsonSchenstedKnuth via quiver representations 
Friday, December 01, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Jeffrey Kuan Columbia 
Combinatorics 
Algebraic constructions of Markov duality functions 
Friday, December 08, 2017 Start: 4:10 PM
Location: 4088 East Hall * 
Tair Akhmejanov Cornell 
Combinatorics 
Affine Growth Diagrams 
Friday, January 12, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Hailun Zheng U. Michigan 
Combinatorics 
A lower bound theorem for centrally symmetric simplicial polytopes 
Friday, January 19, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Joshua Swanson U. Washington 
Combinatorics 
Major Index Asymptotics 
Friday, January 26, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Hanbaek Lyu Ohio State U. 
Combinatorics 
Double jump phase transition in a random soliton cellular automaton 
Friday, February 02, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Nate Harman U. Chicago 
Combinatorics 
Quantum integer valued polynomials and stable representation theory 
Friday, February 09, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Eric Ramos U. Michigan 
Combinatorics 
Families of nested graphs with compatible symmetricgroup actions 
Friday, February 16, 2018 canceled Start: 4:10 PM
Location: 4088 East Hall * 
Evita Nestoridi Princeton U. 
Combinatorics 
Cutoff for random to random card shuffle (cancelled) 
Friday, March 09, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Zachary Hamaker U. Michigan 
Combinatorics 
Ktriangulations, subwords and plane partitions 
Friday, March 16, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Max Glick Ohio State U. 
Combinatorics 
GaleRobinson quivers, representations, and combinatorial formulas 
Friday, March 23, 2018 Start: 4:00 PM
Location: 4088 East Hall * 
Anna Weigandt UIUC 
Combinatorics 
Partition Identities and Quiver Representations 
Friday, March 30, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Bruce Sagan Michigan State University 
Combinatorics 
Descent polynomials 
Friday, April 06, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Neriman Tokcan University of Michigan 
Combinatorics 
Newton Polytopes in Algebraic Combinatorics 
Friday, April 13, 2018 Start: 4:10 PM
Location: 4088 East Hall * 
Robert Walker University of Michigan 
Combinatorics 
Hearing the Limiting Shape of a Hypersurface Configuration 
Friday, September 14, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Dylan Rupel Michigan State University 
Combinatorics 
The Combinatorics of Compatible Pairs 
Friday, September 21, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Anna Weigandt University of Michigan 
Combinatorics 
Bumpless Pipe Dreams and Alternating Sign Matrices 
Friday, September 28, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Daniel Nguyen University of Michigan 
Combinatorics 
Integer points in irrational polyhedra and an extension of Presburger Arithmetic 
Friday, October 05, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Eric Bucher Xavier University 
Combinatorics 
Locally acyclic cluster algebras and reddening sequences 
Friday, October 19, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Pavel Galashin M.I.T. 
Combinatorics 
Ising model and total positivity 
Friday, October 26, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Zachary Hamaker University of Michigan 
Combinatorics 
Weak order for monotone triangles 
Friday, November 02, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Harry Richman University of Michigan 
Combinatorics 
Equidistribution of tropical Weierstrass points 
Friday, November 09, 2018 Start: 3:00 PM
Location: Forum Hall Palmer Commons * 
Jonah Blasiak Drexel University 
Combinatorics 
Fominfest: Catalan functions and kSchur positivity (NOTE unusual location and many other talks throughout the weekend) 
Friday, November 16, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
James Propp University of Massachusetts, Lowell 
Combinatorics 
Dynamics from Posets 
Friday, November 30, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Greg Muller University of Oklahoma 
Combinatorics 
Linear recurrence relations with periodic solutions 
Friday, December 07, 2018 Start: 3:00 PM
Location: 2866 East Hall * 
Bob Lutz University of Michigan 
Combinatorics 
Electrical networks and hyperplane arrangements 
Friday, January 18, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Daping Weng Michigan State University 
Combinatorics 
Cluster Duality of Grassmannian and a Cyclic Sieving Phenomenon of Plane Partitions 
Friday, January 25, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Li Li Oakland University 
Combinatorics 
Frieze varieties of acyclic quivers 
Friday, February 01, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Trevor Hyde University of Michigan 
Combinatorics 
Cohomology configuration space and polynomial factorization statistics 
Wednesday, February 06, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Nati Linial Hebrew University of Jerusalem 
Combinatorics 
Graph metrics  note unusual date! 
Friday, February 08, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Melissa ShermanBennett UC Berkeley 
Combinatorics 
Combinatorics of cluster structures in Schubert varieties 
Friday, February 15, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Oliver Pechenik University of Michigan 
Combinatorics 
Crystal structures for symmetric Grothendieck polynomials 
Friday, February 22, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Dylan Thurston Indiana U. 
Combinatorics 
Unlabelled rigidity 
Friday, March 01, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Martha Precup Washington University, St. Louis 
Combinatorics 
Hessenberg varieties and the StanleyStembridge conjecture 
Friday, March 08, 2019


Combinatorics 
Spring break, no seminar 
Friday, March 15, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
David Speyer University of Michigan 
Combinatorics 
The fundamental theorem of finite semidistributive lattices 
Friday, March 22, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Christian Gaetz MIT 
Combinatorics 
A combinatorial duality and the Sperner property for the weak order. 
Friday, March 29, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Robert Walker University of Michigan 
Combinatorics 
A.S.P. Ideals, Matroid Configurations, and Symbolic Generic Initial Systems 
Friday, April 05, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Jenna Rajchgot University of Saskatchewan 
Combinatorics 
Type D quiver representation varieties, double Grassmannians, and symmetric varieties 
Friday, April 12, 2019 Start: 3:00 PM
Location: 4088 East Hall * 
Eric Katz Ohio State University 
Combinatorics 
The Unipotent Torelli Theorem for Graphs 
Friday, September 06, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Gilyoung Cheong University of Michigan 
Combinatorics 
Cycle index and CohenLenstra distributions given by padic matrices 
Friday, September 13, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Brendon Rhoades UC San Diego 
Combinatorics 
Spanning subspace configurations 
Friday, September 20, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Christopher Eur UC Berkeley 
Combinatorics 
Simplicial generation of Chow rings of matroids 
Friday, September 27, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Hanbaek Lyu UCLA 
Combinatorics 
Phase transition in random contingency tables with nonuniform margins 
Friday, October 04, 2019 Start: 3:00 PM
Location: 4096 East Hall 
David Galvin University of Notre Dame 
Combinatorics 
Total nonnegativity of some combinatorial matrices 
Friday, October 11, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Emily Barnard De Paul University 
Combinatorics 
Graph Associahedra and the Poset of Maximal Tubings 
Friday, October 18, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Jake Levinson University of Washington 
Combinatorics 
A topological proof of the ShapiroShapiro Conjecture 
Friday, October 25, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Alexander Garver University of Michigan 
Combinatorics 
Chapoton triangles and nonkissing complexes 
Friday, November 01, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Christopher Ryba MIT 
Combinatorics 
Combinatorics via Deligne Categories 
Friday, November 08, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Bruce Sagan Michigan State University 
Combinatorics 
Combinatorial and algebraic interpretations of Lucas analogues 
Friday, November 15, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Terrence George Brown University 
Combinatorics 
Spectra of biperiodic planar networks 
Friday, November 22, 2019 Start: 3:00 PM
Location: 4096 East Hall 
Helen Jenne University of Oregon 
Combinatorics 
Combinatorics of the doubledimer model 
Friday, January 17, 2020 Start: 3:00 PM
Location: 4096 East Hall 
Michael Shapiro Michigan State U. 
Combinatorics 
Generalized cluster structures in the space of periodic staircase matrices 
Friday, January 24, 2020 Start: 3:00 PM
Location: 4096 East Hall 
Lauren Williams Harvard U. 
Combinatorics 
Probability and combinatorics: hopping particles and Macdonald polynomials 