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September 2023
Atlantic Graph Theory Seminar
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…
Find out more »October 2023
Atlantic Graph Theory Seminar
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…
Find out more »2023 Science Atlantic MSCS Conference
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…
Find out more »Women in Commutative Algebra II
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…
Find out more »Atlantic Graph Theory Seminar
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…
Find out more »November 2023
Atlantic Graph Theory Seminar
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…
Find out more »Atlantic Graph Theory Seminar
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…
Find out more »University of New Brunswick Data Challenge 2023
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,…
Find out more »Atlantic Graph Theory Seminar
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…
Find out more »December 2023
Advances in Statistical Modeling of Fisheries Data – Seminar
A Spatiotemporal Model of Condition to Derive a Novel Starvation Mortality Index That Improves a State-space Stock Assessment Model for Atlantic Cod on the Southern Grand Bank of Newfoundland Madhura Weerasekera, Centre for Fisheries Ecosystems Research (CFER), Fisheries and Marine Institute of Memorial University of Newfoundland The Atlantic cod stock on the Southern Grand Bank (SGB) of Newfoundland collapsed in the early 1990's coincident with the collapse of cod stocks across Canadian waters. Consequently, a fishing moratorium has been in place…
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