AMS Sectional Meeting Program by Day
Current as of Friday, May 7, 2021 03:30:05
Spring Western Sectional Meeting (formerly at San Francisco State University)
 now meeting virtually, PDT (hosted by the American Mathematical Society), San Francisco, CA
 May 12, 2021 (Saturday  Sunday)
 Meeting #1167
Associate Secretary for the AMS Scientific Program:
Michel L Lapidus, AMS lapidus@math.ucr.edu
AMS 2021 Spring Sectional Meetings will be held VIRTUALLY on the originally planned dates. Further details will be posted as soon as they are available. Send questions to meet@ams.org.
Sunday May 2, 2021

Sunday May 2, 2021, 8:00 a.m.1:00 p.m.
Special Session on Advances in Functional Analysis and Operator Theory, III
Special Session 9, American Mathematical Society
Organizers:
Michel L. Lapidus, University of California, Riverside
Marat V. Markin, California State University, Fresno mmarkin@csufresno.edu
Igor Nikolaev, St. John's University

8:00 a.m.
Zeroone law of orbital limit points.
Karl GrosseErdmann*, Université de Mons, Belgium
Antonio Bonilla, Universidad de La Laguna, Spain
(11674756) 
8:30 a.m.
Perturbations of DAEs and chip redesign.
Carsten Trunk*, TU Ilmenau, Germany
(116746325) 
9:00 a.m.
NevanlinnaPick interpolation: a survey of some multivariable generalizations.
Joseph A Ball*, Virginia Tech
(11674799) 
9:30 a.m.
Break. 
10:30 a.m.
The unique everywhere continuous bound state of the Dirac Delta Potential on $\mathbb{R}^2$.
Michael Maroun*, Boston, MA
(116746179) 
11:00 a.m.
Stability results of small diameter properties in Banach spaces.
Sudeshna Basu*, RKMVERI
Susmita Seal, RKMVERI
(11674615) 
11:30 a.m.
Internally Disclosed Sets of a Real Space.
Rasulkhozha Sultonkhozhaevich Sharafiddinov*, Institute of Nuclear Physics, Uzbekistan Academy of Sciences, Ulugbek, Tashkent 100214, Uzbekistan
(11670346) 
12:00 p.m.
Lie centralizers at zero products on a class of operator algebras.
Hoger Ghahramani, Department of Mathematics, University of Kurdistan, P.O. Box 416, Sanandaj, Iran
Wu Jing*, Department of Mathematics & Computer Science, Fayetteville State University, NC 28301
(116747109) 
12:30 p.m.
Quantum posets and quantum powersets.
Andre Kornell*, Tulane University
Bert Lindenhovius, Tulane University
Michael Mislove, Tulane University
(116747343)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.12:00 p.m.
Special Session on Algebraic Ktheory, Mathematical Physics, and Perfectoid Spaces, III
Special Session 12, American Mathematical Society
Organizers:
Shanna Dobson, California State University, Los Angeles Shanna.Dobson@calstatela.edu
Michael Maroun,

8:00 a.m.
Some open problems in the mathematical theory of Feynman path integrals.
Sonia Mazzucchi*, University of Trento
(11676065) 
9:00 a.m.
Philosophy, cognition, and perfectoid diamonds.
Robert Prentner*, Florida Atlantic University, Center for the Future Mind
(116700283) 
10:00 a.m.
Discussion led by Shanna Dobson and Michael Maroun. 
11:00 a.m.
Open problems and conjectures in Number Theory and Arithmetic Geometry.
Michel L. Lapidus*, University of California, Riverside
(116711221)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.11:30 a.m.
Special Session on Categorical and Combinatorial Methods in Representation Theory, and Related Topics, III
Special Session 19, American Mathematical Society
Organizers:
Mee Seong Im, U.S. Naval Academy
Bach Nguyen, Xavier University of Louisiana bnguy38math@gmail.com
Arik Wilbert, University of Georgia

8:00 a.m.
Weight modules over Lie algebras of polynomial vector fields.
Dimitar Grantcharov, University of Texas, Arlington
Vera Serganova*, UC Berkeley
(116717245) 
8:30 a.m.
Braid rigidity for path algebras.
Lilit Martirosyan*, University of North Carolina, Wilmington
Hans Wenzl, University of California, San Diego
(116717115) 
9:00 a.m.
A geometric complete derived invariant for gentle algebras.
Claire Amiot, Université de Grenoble
Sebastian Opper, Charles University, Prague
PierreGuy Plamondon, Université de Versailles
Sibylle Schroll*, University of Cologne
(116716308) 
9:30 a.m.
Break. 
10:00 a.m.
Structure of Grassmannian cluster categories.
Karin Baur*, University of Leeds, University of Graz
(116716166) 
10:30 a.m.
Combinatorics of injective words for TemperleyLieb algebras.
Rachael Boyd*, Max Planck Institute for Mathematics
Richard Hepworth, University of Aberdeen
(116716168) 
11:00 a.m.
Representations of continuous quivers of Type A.
Kiyoshi Igusa, Brandeis University
Job Rock, Boston, Massachusetts
Gordana Todorov*, Northeastern University
(116719259)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.12:00 p.m.
Special Session on Commutative Algebra, III
Special Session 21, American Mathematical Society
Organizers:
Juliette Bruce, Mathematical Sciences Research Institute, Berkley
Monica Lewis, University of Michigan
Sean SatherWagstaff, Clemson ssather@clemson.edu

8:00 a.m.
On the depth and reflexivity of tensor products.
Uyen H Le*, West Virginia University
Olgur Celikbas, West Virginia University
Hiroki Matsui, University of Tokyo
(11671357) 
8:30 a.m.
Subcomplexes of the Koszul Complex.
Maya Banks, University of Wisconsin  Madison
Aleksandra Sobieska*, University of Wisconsin  Madison
(11671376) 
9:00 a.m.
Critical degree and operations on complexes.
Rebekah J. Aduddell*, University of Texas, Arlington
(11671868) 
9:30 a.m.
Informal Discussion. 
10:00 a.m.
Break. 
10:30 a.m.
Ulrich modules do not always exist.
Farrah C Yhee*, University of Michigan
(116713250) 
11:00 a.m.
Measuring Gorensteinness using the trace of the canonical module.
Janet Page*, University of Michigan
(116713267) 
11:30 a.m.
On Stable trace ideals and Arf rings.
Haydee Lindo*, Harvey Mudd College
H Dao, University of Kansas
(116713306)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.12:50 p.m.
Special Session on Connections between homotopical algebra and geometry, III
Special Session 6, American Mathematical Society
Organizers:
Ryan Grady, Montana State University ryan.grady1@montana.edu
Chris Rogers, University of Nevada, Reno

8:00 a.m.
The coalgebraic structure of the chains on a space determines the fundamental group.
Manuel Rivera*, Purdue University
Mahmoud Zeinalian, Lehman College CUNY
Felix Wierstra, University of Paris, Stockholm University
(11675577) 
9:00 a.m.
The simplicial coalgebra of chains determines homotopy types rationally and one prime at a time.
Felix Wierstra*, University of Amsterdam
(116755229) 
9:30 a.m.
Break. 
10:30 a.m.
Complex Lagrangian intersections and applications to skein theory.
Sam Gunningham*, University of Edinburgh
Pavel Safronov, University of Edinburgh
(116755180) 
11:30 a.m.
Skein categories as factorisation homology.
Juliet Cooke*, Max Planck Institute for Mathematics, Bonn
(116718327) 
12:00 p.m.
Dehn invariants for algebraic $K$theory.
Inna I Zakharevich*, Cornell University
(116718101)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.11:50 a.m.
Special Session on Geodesics in Hyperbolic 2 and 3Manifolds, III
Special Session 10, American Mathematical Society
Organizers:
Maria Trnkova, University of California, Davis
Andrew Yarmola, Princeton University yarmola@math.princeton.edu

8:00 a.m.
Short closed geodesics on cusped hyperbolic surfaces.
Thi Hanh Vo*, University of Luxembourg
(116751105) 
8:30 a.m.
Totally geodesic surfaces in twist knot complements.
Khanh Le, Temple University
Rebekah Palmer*, Temple University
(116751153) 
9:00 a.m.
Some elementary correspondence in group theory (with applications to algebra/geometry).
D. B. McReynolds*, Purdue University
(116757293) 
9:30 a.m.
Informal Discussion. 
10:00 a.m.
Break. 
10:30 a.m.
Geodesic currents and the smoothing property.
Didac Martinez Granado*, University of California, Davis
Dylan Thurston, Indiana University, Bloomington
(11675751) 
11:00 a.m.
Volume bounds for collections of simple closed curves.
Tommaso Cremaschi*, University of Southern California
Andrew Yarmola, Princeton University
José Andrés Rodriguez Migueles, LMU Munich
(116757112) 
11:30 a.m.
Infinitely many virtual geometric triangulations.
David Futer, Temple University
Emily Hamilton, California Polytechnic State University, San Luis Obispo
Neil R Hoffman*, Oklahoma State
(116757149)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.11:50 a.m.
Special Session on Localization and delocalization in ergodic quantum systems, III
Special Session 2, American Mathematical Society
Organizers:
Ilya Kachkovskiy, Michigan State University ikachkov@msu.edu
Wencai Liu, Texas A&M University
Rodrigo Matos, Texas A&M University

8:00 a.m.
Reflectionless canonical systems.
Roman Bessonov, St. Petersburg State University
Milivoje Lukic*, Rice University
Peter Yuditskii, Johannes Kepler Universitat Linz
(116747273) 
8:30 a.m.
StahlTotik regularity for Dirac operators.
Benjamin Eichinger, Institute of Analysis, Johannes Kepler University of Linz
Ethan Gwaltney*, Department of Mathematics, Rice University
Milivoje Lukić, Department of Mathematics, Rice University
(116734119) 
9:00 a.m.
On the wellposedness of the derivative nonlinear Schrödinger equation.
Rowan Killip, UCLA
Maria Ntekoume*, Rice University
Monica Visan, UCLA
(116735268) 
9:30 a.m.
Break. 
10:30 a.m.
On the spectra of separable 2D almost Mathieu operators.
Alberto Takase*, University of CaliforniaIrvine
(11673712) 
11:00 a.m.
Arithmetic version of Anderson localization for a class of smooth quasiperiodic Schrödinger operators.
Lingrui Ge*, University of California, Irvine
(116737281) 
11:30 a.m.
Localization and Cantor spectrum for $C^2$ quasiperiodic onedimensional discrete Schrödinger operators.
Yakir Forman*, Yale University
Tom VandenBoom, Yale University
(116737297)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.12:30 p.m.
Special Session on Quivers, Tensors, and Their Applications, III
Special Session 20, American Mathematical Society
Organizers:
Visu Makam, Institute for Advanced Study
Francesca Gandini, Kalamazoo College francesca.gandini@kzoo.edu
Alana Huszar, University of Michigan
Robert Cochrane, University of Michigan

8:00 a.m.
Invariant theory for maximum likelihood estimation.
Carlos Améndola, Technical University of Munich
Kathlén Kohn, KTH Stockholm
Philipp Reichenbach*, Technical University of Berlin
Anna Seigal, University of Oxford
(116714133) 
8:30 a.m.
Maximum likelihood estimation for matrix and tensor normal models.
Harm Derksen*, Northeastern University
Visu Makam, Institute of Advanced Study
Michael Walter, University of Amsterdam
(116715234) 
9:30 a.m.
Break. 
10:30 a.m.
Lower bounds for matrix multiplication.
Joseph M Landsberg*, Texas A&M University
(116714233) 
11:30 a.m.
Border apolarity and border rank of the 3 $\times$ 3 permanent.
Hang Huang*, Texas A&M University
J M Landsberg, Texas A&M University
Austin Conner, Texas A&M University
(116715246) 
12:00 p.m.
Some explicit Waring decompositions of interesting polynomials.
Austin D Conner*, Harvard University
(116715324)

8:00 a.m.

Sunday May 2, 2021, 8:00 a.m.11:20 a.m.
Special Session on Women in Commutative Algebra  One hundred years of Idealtheorie in Ringbereichen, III
Special Session 7, American Mathematical Society
Organizers:
Eloísa Grifo, University of California, Riverside
Alessandra Costantini, University of California, Riverside

8:00 a.m.
Canonical resolutions over Koszul algebras.
Eleonore Faber, University of Leeds
Martina JuhnkeKubitzke, University of Osnabrück
Haydee Lindo, Harvey Mudd College
Miller Claudia, Syracuse University
Rebecca R.G., George Mason University
Alexandra Seceleanu*, University of NebraskaLincoln
(11671326) 
8:30 a.m.
Duality of closures and interiors defined via colons.
Neil Epstein, George Mason University
Rebecca R.G., George Mason University
Janet Vassilev*, University of New Mexico
(116713169) 
9:00 a.m.
Factorization in numerical semigroup algebras.
Austin Antoniou, The Ohio State University
Ranthony A.C. Edmonds*, The Ohio State University
Bethany Kubik, University of Minnesota Duluth
Christopher O'Neill, San Diego State University
Shannon Talbott, Moravian College
(116713329) 
9:30 a.m.
Break. 
10:30 a.m.
Polyhedral resolutions of powers of monomial ideals of projective dimension one.
Susan Cooper, University of Manitoba
Sabine El Khoury, American University of Beirut
Sara Faridi, Dalhousie University
Sarah MayesTang, University of Toronto
Susan Morey*, Texas State University
Liana Sega, University of MissouriKansas City
Sandra Spiroff, University of Mississippi
(116713111) 
11:00 a.m.
TALK CANCELLED: Constructing regular sequences on powers of monomial ideals.
Louiza Fouli*, New Mexico State University
Huy Tài Hà, Tulane University
Susan Morey, Texas State University
(116713206)

8:00 a.m.

Sunday May 2, 2021, 8:30 a.m.12:30 p.m.
Special Session on Analysis, Combinatorics, and Geometry of Fractals, II
Special Session 4, American Mathematical Society
Organizers:
Kyle Hambrook, San Jose State University kyle.hambrook@sjsu.edu
ChunKit Lai, San Francisco State University

8:30 a.m.
On the existence of Riesz bases of exponentials.
Carlos A Cabrelli, IMAS  UBACONICET
Kathryn E Hare, University of Waterloo
Ursula M Molter*, IMAS  UBACONICET
(116742254) 
9:00 a.m.
Translational tilings in lattices.
Rachel Greenfeld*, UCLA
(116705319) 
9:30 a.m.
Quantization for probability distributions.
Mrinal K Roychowdhury*, University of Texas Rio Grande Valley
(116737216) 
10:00 a.m.
Break. 
10:30 a.m.
Dimensionexpanding polynomials and the discretized ElekesRonyai theorem.
Joshua Zahl*, University of British Columbia
(116742200) 
11:00 a.m.
Decoupling for mixedhomogeneous polynomials in $\mathbb R^3$.
Tongou Yang*, University of British Columbia
Jianhui Li, University of Wisconsin, Madison
(116742203) 
11:30 a.m.
Eliminating obstructions for Thurston maps.
Annina Iseli*, University of California, Los Angeles (UCLA)
Mario Bonk, University of California, Los Angeles (UCLA)
Mikhail Hlushchanka, University of Utrecht, Netherlands
(116737276) 
12:00 p.m.
Erdös similarity conjecture on a type of Cantor sets.
ChunKit Lai*, San Francisco State University
Angel Cruz, San Francisco State University
Malabika Pramanik, University of British Columbia
(116728338)

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.12:00 p.m.
Special Session on Diagrammatic and Combinatorial Methods in Representation Theory, III
Special Session 17, American Mathematical Society
Organizers:
Robert Muth, Washington & Jefferson College rmuth@washjeff.edu rmuth@washjeff.edu
Nick Davidson, Reed College
Peter Tingley, Loyola University Chicago
Tianyuan Xu, University of Colorado Boulder

8:30 a.m.
A multiset partition algebra.
Rosa C Orellana*, Dartmouth College
Mike Zabrocki, York University
(116716192) 
9:00 a.m.
An insertion algorithm on multiset partitions with applications to diagram algebras.
Laura Colmenarejo, University of Massachusetts Amherst
Rosa Orellana, Dartmouth College
Franco Saliola*, Université du Québec à Montréal
Anne Schilling, University of California Davis
Mike Zabrocki, York University
(116705231) 
9:30 a.m.
Break. 
10:30 a.m.
Quasisymmetric Macdonald polynomials.
Sylvie Corteel, University of California, Berkeley
James Haglund, University of Pennsylvania
Olya Mandelshtam, Brown University
Sarah Mason*, Wake Forest University
Lauren Williams, Harvard University
(116705148) 
11:00 a.m.
Kohnert's rule for flagged Schur modules.
Sam Armon, University of Southern California
Sami Assaf*, University of Southern California
Grant Bowling, University of Southern California
Henry Ehrhard, University of Southern California
(11670567) 
11:30 a.m.
Mixing time for Markov chain on linear extensions.
John Rhodes, UC Berkeley
Anne Schilling*, UC Davis
(116705102)

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.11:50 a.m.
Special Session on Differential Geometry and Geometric PDE, III
Special Session 1, American Mathematical Society
Organizers:
Alfonso Agnew, California State University, Fullerton
Nicholas Brubaker, California State University, Fullerton
Thomas Murphy, California State University, Fullerton tmurphy@fullerton.edu
Shoo Seto, California State University, Fullerton
Bogdan Suceavă, California State University, Fullerton

8:30 a.m.
Steady gradient KahlerRicci solitons.
Ronan J Conlon*, The University of Texas at Dallas
Alix Deruelle, UMR 7586 CNRS  Sorbonne Université  Université de Paris
(116753264) 
9:30 a.m.
Break. 
10:00 a.m.
Classification results for expanding and shrinking gradient KahlerRicci solitons.
Alix Deruelle, Institut de mathematiques de Jussieu
Ronan Conlon, UT Dallas
Song Sun*, UC Berkeley
(116753125) 
11:00 a.m.
Analytic stability conditions for polarised varieties.
Ruadhaí Dervan*, University of Cambridge
(116753163)

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.12:00 p.m.
Special Session on Geometric and Categorical Methods in Representation Theory, III
Special Session 16, American Mathematical Society
Organizers:
Ana Balibanu, Harvard University
Daniele Rosso, Indiana University Northwest drosso@iu.edu
Jonathan Wang, Massachusetts Institute of Technology

8:30 a.m.
Boxcounting and Quot schemes.
Noah Arbesfeld*, Imperial College London
Yakov Kononov, Columbia University
(116714227) 
9:00 a.m.
On the invariant theory for the commuting scheme.
TsaoHsien Chen*, University of Minnesota
Bao Chau Ngo, University of Chicago
(116722186) 
9:30 a.m.
Towards a Langlands reciprocity for affine qSchur algebras.
Yiqiang Li*, SUNY at Buffalo
(116717182) 
10:00 a.m.
Break. 
10:30 a.m.
Lagrangian correspondences in Schubert calculus for cotangent bundles.
Iva Halacheva*, Northeastern University
Allen Knutson, Cornell University
Paul ZinnJustin, University of Melbourne
(116718253) 
11:00 a.m.
Fusing MV cycles.
Anne Dranowski*, Institute for Advanced Study
Roger Bai, University of Toronto
Joel Kamnitzer, University of Toronto
(116715256) 
11:30 a.m.
TALK CANCELLED: Hamiltonian reduction for affine Grassmannian slices.
Joel Kamnitzer, University of Toronto
Khoa Pham, University of Toronto
Alex Weekes*, University of British Columbia
(116714147)

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.11:10 a.m.
Special Session on Nonlinear PDEs and fluid dynamics, III
Special Session 13, American Mathematical Society
Organizers:
Igor Kukavica, University of Southern California kukavica@usc.edu
Juhi Jang, University of Southern California
Wojciech Ozanski, University of Southern California

8:30 a.m.
Instability of finite time blowups for incompressible Euler.
Laurent Lafleche, The university of Texas at Austin
Alexis F Vasseur*, The University of Texas at Austin
Misha Vishik, The University of Texas at Austin
(11673544) 
9:00 a.m.
Vanishing viscosity limit for the vortexwave system.
Trinh Nguyen*, University of Southern California
Toan Nguyen, Pennsylvania State University
(116735275) 
9:30 a.m.
Small scale formations in the incompressible porous media equation.
Alexander Kiselev, Duke University
Yao Yao*, Georgia Institute of Technology
(116735107) 
10:00 a.m.
New Estimates on the second derivatives of the 3D NavierStokes equation.
Alexis F. Vasseur, The University of Texas at Austin
Jincheng Yang*, The University of Texas at Austin
(1167352) 
10:30 a.m.
The finite speed of propagation in degenerate Einstein Brownian Motion model.
Isanka Garli Hevage*, Texas Tech University
Akif Ibraguimov, Texas Tech University
(116735187)

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.12:00 p.m.
Special Session on Regularity Theory for Linear and Nonlinear PDEs, III
Special Session 11, American Mathematical Society
Organizers:
Zongyuan Li, Rutgers University zongyuan.li@rutgers.edu
Weinan Wang, University of Arizona
Xueying Yu, Massachusetts Institute of Technology

8:30 a.m.
Hilbertian approximations of monotone operators.
Krutika Tawri, Indiana University,, Bloomington
Roger M Temam*, Indiana University, Bloomington
(11673555) 
9:00 a.m.
On the NernstPlanckNavierStokes Equations.
M. Ignatova*, Temple University
(11673534) 
9:30 a.m.
Informal Discussion. 
10:00 a.m.
Global wellposedness of strong solutions of Doi model with large viscous stress.
Joonhyun La*, Stanford University
(11673536) 
10:30 a.m.
Topological phase transition and solar surface eruptions and sunspots.
Tian Ma, Sichuan University
Shouhong Wang*, Indiana U
(11678237) 
11:00 a.m.
Global existence of weak solutions to the 3D incompressible NavierStokes equations for intermittent initial data in halfspace.
Zachary Bradshaw, University of Arkansas
Igor Kukavica, University of Southern California
Wojciech S Ożański*, University of Southern California
(116776335) 
11:30 a.m.
Informal Discussion.

8:30 a.m.

Sunday May 2, 2021, 8:30 a.m.11:55 a.m.
Special Session on Social Change through Mathematics and Education, I
Special Session 18, American Mathematical Society
Organizers:
Federico Ardila, San Francisco State University
Shandy Hauk, San Francisco State University hauk@sfsu.edu
Ashia Wilson, Massachusetts Institute of Technology
Robin Wilson, California State Polytechnic University, Pomona

8:00 a.m.
Context and contingency: History of Mathematics and Social Change in Mathematics and Education.
Michael J Barany*, University of Edinburgh
(116701237) 
8:45 a.m.
From the abstract to the personal: Who you must become to do equity work.
Aris B Winger*, Georgia Gwinnett College
(116797315) 
9:30 a.m.
Break. 
10:30 a.m.
A panel discussion on social change through mathematics education.
Jayadev Siddhanta Athreya*, University of Washington
Christopher Jett, University of West Georgia
Gregory Larnell, University of Illinois, Chicago
Belin Tsinnajinnie, Santa Fe Community College
Luz ValoyesChávez, Universidad de Chile
(116700183)

8:00 a.m.

Sunday May 2, 2021, 8:30 a.m.11:50 a.m.
Special Session on Topological Perspectives in Graph Theory, Classical and Recent, III
Special Session 3, American Mathematical Society
Organizers:
Jonathan L. Gross, Columbia University gross@cs.columbia.edu
Timothy Sun, San Francisco State University
Thomas W. Tucker, Colgate University

8:30 a.m.
Character tables of twisted linear fractional groups and enumeration of regular maps.
Sona Pavlikova, Slovak University of Technology, Bratislava, Slovakia
Jozef Siran*, Open University and Slovak University of Technology
(116720164) 
9:00 a.m.
Edgeouter embeddability: conditions and constructions.
Joanna A. EllisMonaghan*, KdVI, University of Amsterdam
Mark N. Ellingham, Vanderbilt University
(116705143) 
9:30 a.m.
Klein, dessins d'enfants and projective primes.
Gareth A. Jones*, University of Southampton
Alexander K. Zvonkin, LaBRI, Université de Bordeaux
(11670571) 
10:00 a.m.
Break. 
10:30 a.m.
Partial duality of hypermaps.
Sergei Chmutov*, The Ohio State University, Mansfield
(11670531) 
11:00 a.m.
Partial duality for ribbon graphs, III: A Gray code algorithm for enumeration.
Jonathan L. Gross, Columbia University
Toufik Mansour*, University of Haifa
Thomas W. Tucker, Colgate University
(116705144) 
11:30 a.m.
Infinite families of infinite vertextransitive, nonCayley graphs.
Mark E. Watkins*, Syracuse University
(116705113)

8:30 a.m.

Sunday May 2, 2021, 2:00 p.m.6:00 p.m.
Special Session on Algebraic Ktheory, Mathematical Physics, and Perfectoid Spaces, IV
Special Session 12, American Mathematical Society
Organizers:
Shanna Dobson, California State University, Los Angeles Shanna.Dobson@calstatela.edu
Michael Maroun,

2:00 p.m.
On the smoothness of weak solutions of an abstract evolution equation with a scalar type spectral operator on the real axis.
Marat V. Markin*, California State University, Fresno
(116747312) 
3:00 p.m.
Evaluating spectral statistics of quantum graphs without the semiclassical limit.
Tori Hudgins*, University of Dallas
Jon Harrison, Baylor University
(116781108) 
3:30 p.m.
Break. 
4:00 p.m.
Discussion led by Shanna Dobson and Michael Maroun. 
5:00 p.m.
Discussion.

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.5:20 p.m.
Special Session on Categorical and Combinatorial Methods in Representation Theory, and Related Topics, IV
Special Session 19, American Mathematical Society
Organizers:
Mee Seong Im, U.S. Naval Academy
Bach Nguyen, Xavier University of Louisiana bnguy38math@gmail.com
Arik Wilbert, University of Georgia

2:00 p.m.
Kostant's problem and categorical actions of the Hecke category.
Hankyung Ko*, Uppsala University
(11671730) 
2:30 p.m.
New decomposition numbers of finite classical groups via categorification.
Olivier Dudas, University of Paris
Emily Norton*, University of Clermont Auvergne
(116720290) 
3:00 p.m.
The diagonal reduction algebra of $\frak{osp}(12)$.
Dwight Anderson Williams II*, Iowa State University
Jonas T. Hartwig, Iowa State University
(116716282) 
3:30 p.m.
Break. 
4:00 p.m.
Homological mirror symmetry for the universal centralizers.
Xin Jin*, Boston College
(11672248) 
4:30 p.m.
Representations of (degenerate) affine Hecke algebra of type $C_n$ and combinatorics.
Yue Zhao*, University of California, Davis
(11670597) 
5:00 p.m.
On KazhdanLusztig cells of $\mathbf{a}$value 2.
Tianyuan Xu*, University of Colorado Boulder
R. M. Green, University of Colorado Boulder
(116705157)

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.6:30 p.m.
Special Session on Commutative Algebra, IV
Special Session 21, American Mathematical Society
Organizers:
Juliette Bruce, Mathematical Sciences Research Institute, Berkley
Monica Lewis, University of Michigan
Sean SatherWagstaff, Clemson ssather@clemson.edu

2:00 p.m.
A hypergraph characterization of nearly complete intersections.
Courtney R Gibbons*, Clinton
Chiara Bondi, Hamilton College
Yuye Ke, The Ohio State University
Spencer Martin, University of Virginia
Shrunal Pothagoni, George Mason University
Andrew Stelzer, Lawrence University
(116713156) 
2:30 p.m.
MultiRees algebras of strongly stable ideals.
Gabriel Enrique Sosa Castillo*, Colgate University
KueiNuan Lin, PennState University, Greater Allegheny Campus
Sevi Kara, University of South Alabama
(116713295) 
3:00 p.m.
Geometric vertex decomposition and liaison.
Patricia Klein*, University of Minnesota
Jenna Rajchgot, McMaster University
(116713176) 
4:00 p.m.
Symbolic powers of cover ideals of graphs and Koszul property.
Yan Gu, Soochow University
Tài Huy Hà, Tulane University
Joseph Skelton*, Tulane University
(116713331) 
4:30 p.m.
Characteristic dependence of syzygies of random monomial ideals.
Caitlyn W Booms*, University of WisconsinMadison
Daniel Erman, University of WisconsinMadison
Jay Yang, University of MinnesotaTwin Cities
(11671381) 
5:00 p.m.
Monomial Ideals and Koszul Quotients of Exterior Algebras.
Jason McCullough*, Iowa State University
Zachary Mere, Iowa State University
(11671854) 
5:30 p.m.
Discussion.

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.3:30 p.m.
Special Session on Differential Geometry and Geometric PDE, IV
Special Session 1, American Mathematical Society
Organizers:
Alfonso Agnew, California State University, Fullerton
Nicholas Brubaker, California State University, Fullerton
Thomas Murphy, California State University, Fullerton tmurphy@fullerton.edu
Shoo Seto, California State University, Fullerton
Bogdan Suceavă, California State University, Fullerton

2:00 p.m.
Finite ball quotients and algebraicity of the Bergman kernel.
Peter Ebenfelt, University of California, San Diego
Ming Xiao, University of California, San Diego
Hang Xu*, University of California, San Diego
(116732199) 
3:00 p.m.
Translation surfaces and separable surfaces with constant curvature.
Rafael Lopez*, University of Granada
(11675320)

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.6:00 p.m.
Special Session on Localization and delocalization in ergodic quantum systems, IV
Special Session 2, American Mathematical Society
Organizers:
Ilya Kachkovskiy, Michigan State University ikachkov@msu.edu
Wencai Liu, Texas A&M University
Rodrigo Matos, Texas A&M University

2:00 p.m.
Spectral theory of Schroedinger operators over circle maps.
Sasa Kocic*, University of Mississippi
(116781323) 
2:30 p.m.
Spectral and dynamical properties of aperiodic quantum walks.
David Damanik, Rice University
Jake Fillman*, Texas State University
Darren C Ong, Xiamen University Malaysia
Zhenghe Zhang, University of California, Riverside
(116747120) 
3:00 p.m.
Positivity of the Lyapunov exponent for potentials generated by hyperbolic transformations.
Artur Avila, University of Zurich and IMPA
David Damanik, Rice University
Zhenghe Zhang*, UC Riverside
(116737224) 
3:30 p.m.
Break. 
4:00 p.m.
Agmontype decay of eigenfunctions for a class of Schrödinger operators with noncompact classically allowed region.
Christoph A Marx*, Oberlin College
Hengrui Zhu, Oberlin College
(11678141) 
4:30 p.m.
The exponential decay of eigenfunctions for tight binding Hamiltonians via landscape and dual landscape functions.
Wei Wang, School of Mathematics, University of Minnesota
Shiwen Zhang*, School of Mathematics, University of Minnesota
(116747215) 
5:00 p.m.
Exponential decay of fundamental solutions to Schrödinger operators and the landscape function.
Svitlana Mayboroda, University of Minnesota
Bruno Giuseppe Poggi Cevallos*, University of Minnesota
(116735205) 
5:30 p.m.
Discussion.

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.5:00 p.m.
Special Session on Quivers, Tensors, and Their Applications, IV
Special Session 20, American Mathematical Society
Organizers:
Visu Makam, Institute for Advanced Study
Francesca Gandini, Kalamazoo College francesca.gandini@kzoo.edu
Alana Huszar, University of Michigan
Robert Cochrane, University of Michigan

2:00 p.m.
Simultaneous robust subspace recovery and semistability of quiver representations.
Calin Chindris, University of MissouriColumbia
Daniel Kline*, College of the Ozarks
(116716213) 
2:30 p.m.
Generalized LittlewoodRichardson coefficients for branching rules of classical groups.
Brett Collins*, Bucknell University
(116716214) 
3:00 p.m.
A quiver invariant theoretic approach to radial isotropy and Paulsen's Problem for matrix frames.
Calin I Chindris*, University of MissouriColumbia
(11671535) 
3:30 p.m.
Break. 
4:00 p.m.
Discussion.

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.5:25 p.m.
Special Session on Social Change through Mathematics and Education, II
Special Session 18, American Mathematical Society
Organizers:
Federico Ardila, San Francisco State University
Shandy Hauk, San Francisco State University hauk@sfsu.edu
Ashia Wilson, Massachusetts Institute of Technology
Robin Wilson, California State Polytechnic University, Pomona

2:00 p.m.
The effect of differential victim crime reporting on predictive policing systems.
NilJana Akpinar*, Carnegie Mellon University
Maria DeArteaga, University of Texas at Austin
Alexandra Chouldechova, Carnegie Mellon University
(116700134) 
2:45 p.m.
Race, death, and justice: Capital sentencing in Washington State, 19812014.
Heather D. Evans*, Dept of Sociology, University of Washington
Katherine Beckett, Law, Societies & Justice Dept, University of Washington
(116797309) 
3:30 p.m.
Break. 
4:00 p.m.
Enumerating racial and gender disparities in eviction.
Timothy Thomas*, University of California, Berkeley
Ott Toomet, University of Washington
Alex Ramiller, University of California, Berkeley
Lucero Mejia, University of Washington
Jose Hernandez, University of Washington
(116700332) 
4:45 p.m.
Market design for social good: Using math, algorithms and economics to address social problems.
Irene Y Lo*, Stanford University
(116791305)

2:00 p.m.

Sunday May 2, 2021, 2:00 p.m.5:30 p.m.
Special Session on Topological Perspectives in Graph Theory, Classical and Recent, IV
Special Session 3, American Mathematical Society
Organizers:
Jonathan L. Gross, Columbia University gross@cs.columbia.edu
Timothy Sun, San Francisco State University
Thomas W. Tucker, Colgate University

2:00 p.m.
Directed and directable embeddings.
Blake Dunshee, Belmont University
Mark Ellingham*, Vanderbilt University
Joanna A. EllisMonaghan, University of Amsterdam, Netherlands
(11670525) 
2:30 p.m.
The Wiener ratio for embedded graphs  density and voltages.
Lowell Abrams*, George Washington University
LindseyKay Lauderdale, Towson University
(11670598) 
3:00 p.m.
Break. 
4:00 p.m.
Partialdual genus polynomials and signed intersection graphs.
Qi Yan*, China University of Mining and Technology
(11672033) 
4:30 p.m.
On checkerboard colorable twisted duals and regular checkerboard colorable twisted duals.
X. Jin*, Xiamen University
Q. Yan, China University of Mining and Technology
X. Guo, Xiamen University
(116705162) 
5:00 p.m.
Limits for embedding distributions.
Yichao Chen*, SuZhou University of Science and Technology
Xuhui Peng, Hunan Normal University
Jinliang Zhang, Hunan University
(11670524)

2:00 p.m.
Inquiries: meet@ams.org