Girls STEM Up
2024-02-24 | Delta Hotels by Mariott Fredericton, 225 Woodstock Rd, Fredericton, New Brunswick, Canada
Established in 2019, Girls STEM Up (GSU) has grown into a vibrant community of over members advocating for diversity, inclusion, and equity in STEM. Focused on changing perceptions, GSU hosts an annual conference spotlighting women’s accomplishments in STEM. The event serves as a transformative platform for networking and knowledge exchange, fueling the passion of young women pursuing STEM careers. The upcoming GSU: Bridging the Gap conference in February 2024 promises to be a pivotal experience. Beyond the conference, GSU remains committed to year-round engagement in the STEM community, leaving a meaningful imprint on aspiring girls in STEM through outreach and social media campaigns. With six successful conferences hosting 200+ delegates and 20 speakers, GSU continues to illuminate multiple paths to success in STEM, inviting all to join their inspiring journey.

Atlantic Graph Theory Seminar
2024-02-28 15:30 - 16:30 UTC | Online via Zoom
Pursuit-evasion on Graphs
Trent Marbach, Toronto Metropolitan University
The study of pursuit-evasion on graphs looks at games played between two adversaries, with one player tasked with alluding capture from the other on the graph. We will describe these types of games in general, although we will take a particular focus on two games: the Cops and Robber game, and the Localization game. A famous open conjecture for the Cops and Robber game has spurred recent work in the area, and we show how this work connects to various graph theory topics, including isoperimetry, network search, and width parameters. We will also provide some new applications that have resulted from this work.
Live viewing at Dalhousie in Chase 227 (bring your own mug for tea).
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Join Zoom Meeting
https://us02web.zoom.us/j/86415230827?pwd=[REDACTED]

Meeting ID: 864 1523 0827
Passcode: [REDACTED]

2024 Integration Competition
2024-02-29 | Saint Francis Xavier University, 4130 University Avenue, Antigonish, Nova Scotia, B2G 2W5, Canada
The Integration Competition (held 4 times in the past at this university, funded by AARMS), is a head-to-head competition, in which all first-year calculus students are eligible to compete. Integrals of increasing difficulty are projected, and two students work head to head, to solve it first. The winner moves on, and the other student is eliminated. This process moves through successive rounds until only 2 students are left, solving a challenging problem in integration. This generates excitement about mathematics among first year students, aids in recruitment of students to the mathematics major program, and provides motivation for students to engage more deeply with the curriculum in first-year calculus. This event will also serve as an outreach opportunity to connect first-year students with upper-year students, and to discuss opportunities available to math students.

Acadia Math Buffet
2024-03-04 | Acadia University, Wolfville, Nova Scotia, Canada
Acadia’s Math Buffets are a chance for students in grades 9- 12 in Hants, Kings and Annapolis counties to explore new and interactive topics in mathematics. In these 2-hour sessions, students will learn about a variety of math topics, such as networks, Google page rank, cryptography, problem solving and how to win at darts.

Atlantic Graph Theory Seminar
2024-03-06 15:30 - 16:30 | Online via Zoom
Induced subgraphs and treewidth
Speaker: Sophie Spirkl, University of Waterloo
Abstract: Treewidth is a measure of the complexity of a graph and has both structural and algorithmic consequences. While results of Robertson and Seymour characterize which minors appear in graphs of large treewidth, the same question is still open for induced subgraphs. I will present some recent results towards an answer to this question, in particular, about when excluding a finite set of induced subgraphs leads to the answer being “what we expect”. Joint work with Bogdan Alecu, Maria Chudnovsky, and Sepehr Hajebi.

Join Zoom Meeting
https://us02web.zoom.us/j/86415230827?pwd=[REDACTED]

Meeting ID: 864 1523 0827
Passcode: [REDACTED]

Live viewing with refreshments in Chase 227, Dalhousie University (bring your own mug for tea.)

Integration Tournament for UPEI students
2024-03-14 | University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
Integration Tournament and Pi day event for UPEI Undergraduate Students.

39th Annual New Brunswick Mathematics Competition
2024-05-10 | 5 Locations in New Brunswick, New Brunswick
The provincial New Brunswick Math Competition is a bilingual math competition that takes place in May each year. Students in grades 7-9 from across the province (approximately 1,100 students) attend one of five university locations to simultaneously write the one-hour math competition. There are three competition papers according to grade; each available in both English and French. Following the competition in the morning, students attend enrichment activities held at the universities; awards are distributed at all locations late afternoon. The campuses include UNB Fredericton and Saint John, and the University de Moncton in Moncton, Edmundston, and Shippagan.

CMS-UPEI-AARMS Regional Math Camp
2024-05-10 - 2024-05-12 | University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
The School of Mathematical and Computational Science (SMCS) is once again organizing the UPEI-CMS-AARMS Regional Math Camp, to be held at UPEI between May 10 – May 12, 2024. We anticipate hosting some of the most talented grade 10 and grade 11 math students from across the Island. This year, we expect to invite 20-25 students. We offer students an opportunity to participate in challenging, intellectual activities with their peers, guided by the UPEI SMCS faculty members. The students will arrive on the UPEI campus by 9:00 am on Friday (May 10), spend 2 nights in residence, and depart at noon on Sunday (May 12). With the help of several volunteer undergraduate math majors, faculty members will conduct several educational, problem-solving and career sessions during the daytime, and recreational sessions during the evenings. The students will be chaperoned at all times
throughout the weekend.

16th East Coast Combinatorics Conference
2024-05-13 - 2024-05-14 | Memorial University (Grenfell Campus), Cornerbrook, Newfoundland and Labrador, Canada
The East Coast Combinatorics Conference is a 2-day annual event that brings together researchers in graph theory, design theory, and other areas of combinatorics. There will be two plenary speakers, and a number of contributed talks, in addition to opportunities for collaboration. The event brings together established researchers and those in the early stages of their academic careers and provides opportunities for subsequent collaborative research projects. We encourage participation by students since they greatly benefit from the opportunity to meet and interact with their peers across the region, as well as to hear about the many and varied research interests of faculty. This year’s event will take place at Grenfell Campus, Memorial University, located in Corner Brook on the scenic west coast of Newfoundland.

Atlantic Topological Quantum Field Theory Spring School 2024
2024-05-20 - 2024-05-24 | Memorial University (St. John’s Campus), St. John's, Newfoundland and Labrador, Canada
Topological Quantum Field Theory lives at the intersection of category theory, algebraic topology, representation theory, and theoretical physics. Physically, TQFTs describe and control the symmetries of quantum systems, including quantum symmetries, anomalous symmetries, and higher-form symmetries. Mathematically, TQFTs provide a dictionary between manifold topology and structures in representation theory, and as such allow computations and results to move between these separate fields. This school, aimed at early- to mid-career graduate students, will consist of three 5-hour minicourses related to TQFTs, plus problem sessions and discussion time. Students are expected to be familiar with the basic language of category theory, but are not expected to have any specialized knowledge in the field.

Blundon Seminar Math Camp
2024-05-23 | Memorial University (St. John’s Campus), St. John's, Newfoundland and Labrador, Canada
The Blundon Seminar is an annual math camp for senior high school students from Newfoundland who are interested in mathematics and demonstrate consistently good performance in mathematics competitions. Participation in the math camp is by invitation
only based on the results of preceding Blundon, COMC, Euclid, Fermat, and Cayley contests. Usually we invite 35 – 50 students. During the seminar the students attend talks given by mathematics professors on various mathematical topics and applications in science and engineering. There are problem solving sessions and other activities such Mathletics or Papers Chase. The winner of the Blundon Contest is presented with the Blundon Shield, and the winners of other contests are also presented with money and book prizes.

UNB CMS Math Camp
2024-05-24 - 2024-05-26 | University of New Brunswick (Fredericton Campus), Fredericton, New Brunswick, Canada
With support from the Canadian Mathematical Society and the Atlantic Association for Research in the Mathematical Sciences, the Department of Mathematics and Statistics at the University of New Brunswick (Fredericton) hosts a three-day, two-night Math Camp. The camp gives a select number of Grade 10 students who are keenly interested in mathematics the opportunity to come stay on the Fredericton Campus, meet fellow students from across the province who share a love of mathematics, and enjoy solving challenging problems together, hearing talks from guest speakers, and playing “basketball math”, among other fun activities.

5th Annual Calculus Instruction in Atlantic Canada Conference
2024-05-24 | Mount Saint Vincent University, 166 Bedford Hwy, Halifax, Nova Scotia, B3M 2J6
The purpose of this workshop is to bring together high school and university instructors from across the Atlantic region to discuss evidence-based pedagogy and innovative instructional methodologies used in introductory calculus courses. From these discussions, we aim to better understand the needs of students in our region, and develop course structures and resources which address these needs in our universities and high schools. This year the focus topic is “Expressing Mathematics in a Meaningful Way”. Students often have difficulty communicating their mathematical ideas. We will explore common errors that students make, ways to improve communication skills and increase comfort and confidence in using math terminology and notation, and ways in which errors can inform our teaching. The one day event will consist of a plenary talk and panel in the morning, with discussion. Lunch will be together, then breakout groups to discuss specific topics.

Canadian Statistics Student Conference 2024
2024-06-01 | Memorial University (St. John’s Campus), St. John's, Newfoundland and Labrador, Canada
The Canadian Statistics Student Conference (CSSC) is a national conference organized by students that aims to provide opportunities for students and recent graduates in statistics-related fields to network with one another, present their research, and engage in a variety of discussions. This year, the conference will take place on Saturday, June 1, 2024 at Memorial University in St. John’s, Newfoundland. It will consist of undergraduate and graduate oral and poster presentations, a skills-based workshop, a career panel, a keynote talk, and various networking opportunities. The organizing committee will provide travel, translation, and best oral and poster presentation awards to undergraduate and graduate students to assist students’ research and participation at the conference.

Women in Commutative Algebra III
2024-06-02 - 2024-06-07 | Mexico, Mexico
In order to improve the visibility of female researchers in commutative algebra and to give them an opportunity to enlarge and strengthen their scientific networks, we are hosting a 5-day collaborative research workshop entitled “Women in Commutative Algebra III” (or ”WICA III”). The major objectives of the workshop are to advance commutative algebra through cutting-edge re-search; promote the research of women in commutative algebra; facilitate collaborative interaction between junior and senior mathematicians, which includes bolstering leadership among women researchers, and providing mentoring for early career mathematicians; cultivate a research network among women commutative algebraists; advance the academic careers of women algebraists through research publications and professional connections, including those from historically underrepresented groups, from universities with a teaching focus and small colleges, and those isolated geographically from potential collaborators.

Atlantic General Relativity Conference
2024-06-18 - 2024-06-20 | University of New Brunswick (Fredericton Campus), Fredericton, New Brunswick, Canada
The annual Atlantic General Relativity Conference (AGR) will be held at the University of New Brunswick , scheduled for June 18-19, 2024. The Atlantic General Relativity Conference series of meetings has been a regular and annual feature of the Atlantic GR community for nearly three decades. This series of meetings focusses on recent developments in all aspects of classical and quantum gravity.
The first day of the meeting will be dedicated to postdoctoral fellows giving introductory lectures on different subtopics in gravitational physics for graduate students. The following two days will have a conference format with contributed talks. The contributed talks are particularly aimed at ensuring that Atlantic Canadian graduate students, and occasionally undergraduate students, have the opportunity to present their research in a conference setting.

Indigenous Math Camp
2024-06-23 - 2024-06-28 | Dalhousie University, Halifax, Nova Scotia, Canada
The Indigenous Math Camp is a new camp that will run this coming summer at Dalhousie’s department of Mathematics and Statistics. The premise is to give indigenous Nova junior high students a real university experience mathematics and open up the doorway to careers in STEM. The campers will stay in Dalhousie residences. The campers are br two groups that change between the Mathematics sessions and the Coding sessions each day. The two teaching teams (one for Math and one for Coding) will ideally pair a bla teacher with a faculty member. A puzzle-based approach is proposed for the Math sessions, while the Coding sessions cover Scratch, a programming environment suitable for The curricula for both sessions will be co-developed by indigenous educators as well as faculty from Dalhousie University, with input from the Alliance of Indigenous Math Circles.

Black Educators' Association - Dalhousie Math Camp
2024-07-07 - 2024-07-12 | Dalhousie University, Halifax, Nova Scotia, Canada
The BEA/DAL Math Camp offers African-Nova Scotian junior high school youth, a math-based real university experience, to open doorways to STEM careers. The campers are broken into two groups that change between Mathematics sessions and Coding sessions. Each session has a black high school teacher paired with a university teacher as instructors. A puzzle-based approach is proposed for the Math sessions. In these sessions campers will explore topics like logic puzzles, counting based card tricks, binary numbers & error correcting codes, and the application of algebra to solve puzzles. The Coding sessions cover Scratch, a programming environment suitable for youth.

Junior Math and Computer Science Camp
2024-07-08 - 2024-07-12 | Acadia University, Wolfville, Nova Scotia, Canada
This week-long day camp is an opportunity for students entering grades 5 or 6 in the Annapolis Valley to participate in fun and enriching science-based activities with Acadia faculty and students to develop their curiosity and enjoyment of mathematics, statistics, and computer science. It represents an important piece of a multi-year plan to develop the mathematics skills of young students in the Annapolis Valley by bringing young students into the Acadia University outreach program. This will begin the process of positively engaging students with mathematics and computer science at a critical time in their education. Bursaries are provided for those who qualify for financial assistance.

Dalhousie Math Camp 2024
2024-07-21 - 2024-07-25 | Dalhousie University, Halifax, Nova Scotia, Canada
The Dalhousie Math Camp is an annual event, held for one week in early July. We will accept 20 participants into the program, 10 female and 10 male, that are entering eleventh or twelfth grade in the following school year. We reach out to schools across Nova Scotia and ask for nominations of two students that are enthusiastic and hard working. The students stay and have their meals at the dormitories at Dalhousie for a week and attend seminars in both the morning and afternoon. They have access to the Dalplex recreational facility between the afternoon sessions and dinner. We also plan to have excursions into the city to see and do various different extracurricular activities throughout the math camp period. In addition to exposing students to high level mathematics, tailored to their level, they also get the experience of living on a university campus, and exploring some of Halifax.

Diversity in the Mathematical Sciences 2024
2024-07-29 - 2024-08-02 | Dalhousie University, Halifax, Nova Scotia, Canada
The goals of the summer school are two-fold. First, to introduce students to research level mathematics and second, to encourage more female and female-identifying students to pursue graduate school in the mathematical sciences. The research theme of the 2024 summer school will be Combinatorial Commutative Algebra, as described below. By introducing the advanced mathematics in a supportive and engaging environment, we aim to give students the tools and the support structure that will enable them to thrive in graduate school.

Diversity in the Mathematical Sciences 2024
2024-07-29 - 2024-08-02 | Dalhousie University, Halifax, Nova Scotia, Canada
Objectives: The mathematical institutes in Canada have joined forces to offer annual summer schools geared toward women and underrepresented groups in mathematics and related sciences. The first school will be at Dalhousie University in Summer 2024.
The goals of the summer school are two-fold. First, to introduce students to research level mathematics and second, to encourage more female and female-identifying students to pursue graduate school in the mathematical sciences. The research theme of the 2024 summer school will be Combinatorial Commutative Algebra, as described below. By introducing the advanced mathematics in a supportive and engaging environment, we aim to give students the tools and the support structure that will enable them to thrive in graduate school.
Synopsis: The main tools to study zero sets of polynomials using algebraic tools come from Commutative Algebra. When the polynomials have only one term – monomials – one can use methods from combinatorics, topology, linear programing and more to study their algebraic properties. The development of such techniques, going back to the 1960’s and still a vibrant area of research today, is the focus of the field of Combinatorial Commutative Algebra.
Our school will introduce some of these ideas to the participants via concrete examples and problems. We will cover topics including: edge ideals of graphs, Hilbert functions, computational commutative algebra and discrete homotopy theory.
The school will also include panels, discussions of graduate school, academic and nonacademic jobs and issues facing women in mathematics in general. We will have morning lectures, afternoon tutorials and mini-topics.
We are seeking applications from female and female-identifying students who have finished at least two years of an undergraduate degree in the mathematical sciences.
Required background: Applicants having successfully completed a Honour’s-level proof-based course in linear algebra will be given full consideration. A third-year course in algebra covering rings and ideals will be considered an asset.
Applicants should submit transcripts, and arrange for a letter of recommendation addressing their potential to benefit from this school.
Funding: The Summer School will cover room and board as well as travel expenses for all participants.

Graph Searching in Canada Workshop 2024
2024-08-07 - 2024-08-09 | Dalhousie University, Halifax, Nova Scotia, Canada
The Graph Searching in Canada 2024 workshop will be held at Dalhousie University on August 7-9, 2024. The purpose of the workshop is to bring together researchers studying graph searching problems and their variants, such as as Cops and Robbers, Localization, searching, firefighting, burning, and eternal domination. Our plenary speakers will be Dr. Andrea Burgess (University of New Brunswick – Saint John) and Dr. Kerry Ojakian (Bronx Community College – CUNY).
In addition to the plenary talks, there will be contributed talks in the mornings, with the afternoons free for discussion, networking, and collaboration. A student workshop, aimed at graduate and senior undergraduate students, will be held on August 7th.

Atlantic Graph Theory Seminar
2024-09-18 15:30 - 16:30 | Zoom seminar
Title: How do we use graphs to transmit quantum information?
Time: 3.30pm, Atlantic time, (1:30, CDT) Wednesday Sept. 18
Speaker: Hermie Monterde, University of Manitoba
Abstract:
In this talk, a graph $G$ represents a quantum spin network (a networking of interacting subatomic particles). The vertices and edges of $G$ represent the particles and their interactions in the network. Consider the complex unitary matrix $U(t)=exp(itA)$, where $A$ is the adjacency matrix of $G$, $i^2=-1$ and $t$ is a real number. The propagation of quantum states in the quantum system determined by $G$ is governed by the matrix $U(t)$. In particular, $|U(t)_{u,v}|^2$ may be interpreted as the probability that the quantum state assigned at vertex $u$ is transmitted to vertex $v$ at time $t$. In this talk, we give an overview of the study of quantum state transfer in graphs. We discuss old and new results in this area with emphasis on the concepts and techniques borrowed from graph theory and linear algebra.

Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]

Atlantic Graph Theory Seminar
2024-09-25 15:00 - 16:30 | Online via Zoom
Recolouring Graphs: Decompositions, A Dichotomy Theorem and Frozen Colourings
Speaker: Kathie Cameron, Wilfrid Laurier University
A k-colouring of a graph G is an assignment of at most k colours to the vertices of a graph so that the ends of each edge of the graph get different colours. We consider the question: When it is possible to obtain any k-colouring from any other by changing the colour of one vertex at a time, while always having a k-colouring? This question is equivalent to asking whether the “reconfiguration graph” is connected: The reconfiguration graph of the k-colourings, denoted Rk(G), is the graph whose vertices are the k-colourings of G, and two colourings are adjacent in Rk(G) if they differ in colour on exactly one vertex. We call a graph recolourable if Rk(G) is connected for every k greater than its chromatic number.

We have characterized the graphs H such that all graphs G which don’t contain H as an induced subgraph are recolourable. We have done the same when two 4-vertex graphs are excluded as induced subgraphs (except for one class) and for some classes of graphs which exclude as an induced subgraph the path on 5 vertices.

Decompositions are important in solving optimization problems on structured classes of graphs. We have shown that modular decomposition and a stronger version of clique cutsets which we call tight clique cutsets can be used to show that certain classes are recolourable.

A k-colouring of a graph is called frozen if there is no vertex whose colour can be changed so that the result is still a k-colouring. A frozen colouring corresponds to an isolated vertex of the reconfiguration graph, and thus the existence of a frozen colouring is one way to show that a class of graphs is not recolourable. We have found several new classes of graphs with frozen colourings and an operation which transforms a k-chromatic graph with a frozen (k+1)-colouring into a (k+1)-chromatic graph with a frozen (k+2)-colouring.
This is joint work with Manoj Belavadi, Elias Hildred, Owen Merkel and Dewi Sintiari.

Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]

Meeting ID: 868 6149 9971
Passcode: [REDACTED]

Atlantic Graph Theory Seminar
2024-10-02 15:30 - 16:30 | Online via Zoom
The Martin Invariant and Other Results on the Interlace Polynomials
Josephine Reynes, University of Waterloo
There are many well studied graph polynomials, but this talk will focus on the Martin polynomial and the interlace polynomial. Specifically, this talk will look at how these two polynomials are related and how results on the Martin polynomial can be extended to the interlace polynomial. The Martin invariant, a specific evaluation of the Martin polynomial, obeys the symmetries of the Feynman period. The Feynman period of a graph is useful in quantum field theory, but difficult to compute and thus there is interest in finding graph invariants that have the same symmetries. It was quickly established that the interlace polynomial on interlace graphs was equal to the Martin polynomial on the associated 4-regular graph. While only graphs not containing a set of forbidden vertex minors are interlace graphs, the interlace polynomial is defined over all graphs. We discuss how this provides a way to try and extend the notion of Feynman symmetries via the interlace polynomial and some specific classes of graphs with formulas. Additionally, the interlace polynomial is only equal to the Martin polynomial for interlace graphs of 4-regular graphs, but the Martin polynomial is defined for 2k-regular graphs. Thus, we work toward creating an interlace-like polynomial for graphs derived from 2k-regular cases of the Martin polynomial.
Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]
Meeting ID: 868 6149 9971
Passcode: [REDACTED]

2024 Science Atlantic Mathematics Statistics and Computer Science Undergraduate Student Conference
2024-10-04 - 2024-10-05 | Acadia University, Wolfville, Nova Scotia, Canada
The 2024 Science Atlantic Mathematics, and Computer Science Conference will take place at Acadia University during October 4-5, 2024. The conference will consist of a collection of invited plenary lectures, mathematics and computer science competitions and scientific research presentations by undergraduate students.
The conference is part of the larger annual Science Atlantic Mathematics, Statistics and Computer Science Conference series.
One overall aim of this exciting conference series is to bring together undergraduate students and faculty from universities based in Atlantic Canada. In doing so, the conference series promotes Scientific Discovery and literacy within the Mathematical, Statistical and Computing Sciences while at the same time fostering existing and promoting new collaborative and interdisciplinary activities amongst students and faculty.

Atlantic Graph Theory Seminar
2024-10-23 15:30 - 16:30 | Online via Zoom
Speaker #1: Peter Collier, Dalhousie University
Title #1: Zero Forcing on Twisted Hypercubes

Abstract #1:
The hypercube stands out as a compelling and versatile structure that extends the geometric notion of a cube into higher dimensions. We study the twisted hypercube variant in an attempt to optimize processes on similarly degree-regular, highly connected graphs. The particular process we optimize is zero forcing, a graph infection process in which a particular colour change rule is iteratively applied to the graph and an initial set of vertices. We use the alternative framing of forcing arc sets to construct a family of twisted hypercubes of dimension k$geq3$ with zero forcing sets of size $2^{k-1}-2^{k-3}+1$.

Speaker #2: Alexander Clow, Simon Fraser University
Title #2: Cornering Robots and Synchronizing Automata

Abstract #2:
A deterministic finite automata (DFA) is a model for any deterministic computational system with a finite number of states. In this talk, we describe a DFA as a finite directed multigraph G = (V, E), possibly with loops, along with an edge labelling ψ : E → Ψ. Here the vertices of the graph are the states the system might be in, the edge labels are possible inputs to the system, and the edges represent the transitions between states. Words σ generated from the alphabet Ψ act on vertices, v, as if v is the initial state of the system, and σ(v) is the state of the system after input σ is given. A word σ is synchronizing if for all u, v ∈ V , σ(u) = σ(v).
In this talk, we define a general strategy for constructing synchronizing words, which we call the cornering strategy. We then show that a DFA is synchronizable if and only if the cornering strategy can be successfully applied. As a demonstration of the strategy, we will discuss how all DFAs arising from movement in Rd can be synchronized. This is joint work with Peter Bradshaw (University of Illinois Urbana-Champaign) and Ladislav Stacho (Simon Fraser University).

Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]

Meeting ID: 868 6149 9971
Passcode: [REDACTED]

Atlantic Graph Theory Seminar
2024-10-30 15:30 - 16:30 | Online via Zoom
Some problems on graph sequences
David Galvin, University of Notre Dame

I’ll talk about some problems concerning unimodality (or otherwise) of some graph sequences that come from enumeration. The focus will be on the matching sequence, the independent set sequence and the domination sequence of a graph. As well as mentioning some recent work (with Ball, Hyry, Taylor and Weingartner, and with Zhang), I’ll describe some favorite open problems.

Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]

Meeting ID: 868 6149 9971
Passcode: [REDACTED]

Atlantic Graph Theory Seminar
2024-11-06 15:30 - 16:30 | Online via Zoom
On the two table case of the directed Oberwolfach problem
Speaker: Alice Lacaze-Masmonteil, University of Regina

A directed variant of the famous Oberwolfach problem, the directed Oberwolfach problem considers
the following scenario. Given n people seated at t round tables of size m1,m2 . . . ,mt , respectively,
such that m1+m2+· · ·+mt = n, does there exist a set of n−1 seating arrangements such
that each person is seated to the right of every other person precisely once? I will first demonstrate
how this problem can be formulated as a type of graph-theoretic problem known as a cycle decomposition
problem. Then, I will discuss a particular style of construction that was first introduced
by R. Häggkvist in 1985 to solve several cases of the original Oberwolfach problem. Lastly, I will
show how this approach can be adapted to the directed Oberwolfach problem, thereby allowing
us to obtain solutions for previously open cases. Certain results discussed in this talk arose from
collaboration with Daniel Horsley.

Zoom link:
https://us02web.zoom.us/j/86861499971?pwd=[REDACTED]

Meeting ID: 868 6149 9971
Passcode: [REDACTED]
