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September 2023

Atlantic Graph Theory Seminar

September 20, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Time: 3.30pm, Atlantic time, Wednesday Sept.20 Speaker: Jessica McDonald, Auburn University Title: On flows (and group-connectivity) in signed graphs Abstract: In this talk we'll start by discussing flows in signed graphs and how it generalizes the usual notion of integer flows in graphs. In particular, flow-colouring duality of graphs in the plane can be re-interpreted using signed graphs in the projective plane. Also, where a flow in a graph can be viewed as a sum of flows on cycles, in…

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October 2023

Atlantic Graph Theory Seminar

October 4, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Speaker: Iain Beaton, Acadia University Title: On the Unimodality of Nearly-Well Dominated Trees Abstract: A polynomial is said to be unimodal if its coefficients are non-decreasing and then non-increasing. The domination polynomial of a graph G is the generating function of the number of dominating sets of each cardinality in G, and its coefficients have been conjectured to be unimodal. In this talk we will show the domination polynomial of a tree T is unimodal so long as the sizes of the minimal…

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2023 Science Atlantic MSCS Conference

October 13, 2023 - October 15, 2023
University of Prince Edward Island Charlottetown, Prince Edward Island Canada

The Science Atlantic Mathematics, Statistics, and Computer Science Conference is an annual regional event. It provides a platform for undergraduate students in Mathematics, Statistics and Computer Science at Atlantic Canadian universities to disseminate their research projects, participate in contests, and network with other students in the region. It also serves as a networking event for faculty members of Atlantic Canadian universities. In 2023, University of Prince Edward Island will host the conference in Charlottetown, PEI. The dates of the conference…

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Women in Commutative Algebra II

October 16, 2023 - October 20, 2023
Trento Trento, Italy + Google Map

The purpose of this event is to establish and enhance research networks among women and female identifying mathematicians who work in the areas of mathematics related to commutative algebra. It will be the second of its kind. The first one (Banff 2019) was an amazing success, with many of the groups still working together. It has led to a strong network that besides research, provides visibility for women and many opportunities for professional development. It has also served as an…

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Atlantic Graph Theory Seminar

October 18, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Two short talks by grad students Alex Clow and William Kellough. 'Live' viewing in Chase 227 for those at Dalhousie. Talk 1: Alex Clow, Simon Fraser University Polynomially Bounding the Oriented Chromatic Number in Euler Genus In this talk we consider the oriented chromatic number of graphs with bounded Euler genus. In particular, we present our proofs that the oriented chromatic number is at most $g^{6400}$ for sufficiently large $g$ and at least $\Omega((\frac{g^2}{\log g})^{1/3})$. This is a major improvement…

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November 2023

Atlantic Graph Theory Seminar

November 1, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Detecting (Di)Graphical Regular Representations Speaker: Joy Morris, U. Lethbridge Abstract: Graphical and Digraphical Regular Representations (GRRs and DRRs) are a concrete way to visualise the regular action of a group, using (di)graphs. More precisely, a GRR or DRR on the group $G$ is a (di)graph whose automorphism group is isomorphic to the regular action of $G$ on itself by right-multiplication. For a (di)graph to be a DRR or GRR on $G$, it must be a Cayley (di)graph on $G$. Whenever…

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Atlantic Graph Theory Seminar

November 22, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Speaker:  Santiago Guzman-Pro, TU Dresden Title:          Forbidden Tournaments and the Orientation (Completion) Problem Abstract:   For a fixed finite set of  oriented graphs F,  the F-free  orientation problem asks whether a given finite undirected graph G has an F-free orientation, i.e., whether the edges of  G  can be  oriented so that the  resulting  oriented  graph does not contain  any oriented graph from F as an oriented (induced) subgraph. It was first noted by Bang-Jensen, Huang, and Prisner that when F…

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University of New Brunswick Data Challenge 2023

November 24, 2023
University of New Brunswick (Fredericton Campus) Fredericton, New Brunswick Canada + Google Map

The UNB Data Challenge 2023 will bring together two competitive tracks, Data Visualization (8th Annual), and Data Analytics (4th Annual) on Nov. 24, 2023, in a virtual format! Take up the challenge and demonstrate the power of data. Participants and teams will have the chance to showcase their ability to tell a story driven by data in unique competitive formats. Teams can participate in both tracks. It is an ideal setting for citizens to get engaged, meet leaders in academia,…

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Atlantic Graph Theory Seminar

November 29, 2023 @ 3:30 pm - 4:30 pm
Online via Zoom

Speaker: Jordan Barrett, Toronto Metropolitan University Title: Graph burning, the burning number conjecture, and burning density Abstract: Graph burning is a discrete time process on a graph that acts as a simple model for the spread of social contagion in a network. Graph burning was introduced by Bonato, Janssen and Roshanbin in 2014, and with this introduction came the now famous "burning number conjecture". In the first half of my talk, I will introduce graph burning and give a brief overview of…

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December 2023

Session on Combinatorial Design Theory at the 2023 Winter Meeting of the Canadian Mathematical Society

December 1, 2023 - December 4, 2023
Montreal Montreal, Quebec Canada + Google Map

Combinatorial design theory has a history dating back to the 18th century when Leonhard Euler pondered the existence of orthogonal pairs of Latin squares. This session will showcase recent results in topics such as classical designs, cycle systems, graph decompositions, Latin squares and other aspects of design theory.

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