AMS Sectional Meeting AMS Special Session
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.
Special Session on Topological Perspectives in Graph Theory, Classical and Recent

Saturday May 1, 2021, 8:30 a.m.11:50 a.m.
Special Session on Topological Perspectives in Graph Theory, Classical and Recent, I
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.
Kirchhoff Index for circulant graphs.
Alexander Mednykh*, Sobolev Institute of Mathematics
Ilya Mednykh, Sobolev Institute of Mathematics
(11670596) 
9:00 a.m.
Embeddings of action graphs.
Tomaž Pisanski*, University of Primorska
Thomas W Tucker, Colgate University
(11670594) 
9:30 a.m.
Random simplehomotopy theory.
Frank H Lutz*, TU Berlin
(116757201) 
10:00 a.m.
Break. 
10:30 a.m.
The critical group of an embedded graph.
Criel Merino, Universidad nacional Autónoma de México
Iain Moffatt*, Royal Holloway, University of London
Steven D. Noble, Birkbeck, University of London
(116705138) 
11:00 a.m.
Types of embedded graphs, and their Tutte polynomials.
Stephen Huggett*, Liskeard, Cornwall
(116705142) 
11:30 a.m.
On representation of the automorphism group of a graph in a unimodular group.
Roman Nedela*, Zapadoceska Univerzita v Plzni
(11670529)

8:30 a.m.

Saturday May 1, 2021, 2:00 p.m.5:30 p.m.
Special Session on Topological Perspectives in Graph Theory, Classical and Recent, II
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.
On Kainen's conjectures on surface crossing numbers.
Timothy Sun*, San Francisco State University
(11670570) 
2:30 p.m.
PartialTriality Polynomials for Ribbon Graphs, Part I.
Jonathan L Gross*, Columbia University
Thomas W. Tucker, Colgate University
(11670547) 
3:00 p.m.
PartialTriality Polynomials for Ribbon Graphs: Part II.
Thomas W. Tucker*, Colgate University
Jonathan L. Gross, Columbia University
(11670552) 
3:30 p.m.
Break. 
4:00 p.m.
Edgemaximal graphs on surfaces.
James Davies*, Department of Combinatorics and Optimization, University of Waterloo.
Florian Pfender, Department of Mathematical and Statistical Sciences, University of Colorado Denver.
Carsten Thomassen, Department of Applied Mathematics and Computer Science, Technical University of Denmark.
(11670513) 
4:30 p.m.
Partial twuality polynomials.
Qiyao Chen*, Hunan University
Yichao Chen, Suzhou University of Science and technology
Jonathan Gross, Columbia University
(116705159) 
5:00 p.m.
Observations and answers to questions about edgetransitive maps.
Marston D E Conder*, University of Auckland
(11675732)

2:00 p.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.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.
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