AARMS COVID-19 Seminar: Amy Hurford (MUN)
2020-08-26 15:00 - 16:30 (America/Halifax) | Zoom seminar
Modelling the impact of travel restrictions on COVID-19 cases in Newfoundland and Labrador
Imported infections disproportionally contribute to coronavirus disease 2019 (COVID-19) outbreaks in regions where infection prevalence is low. On May 4th, Newfoundland and Labrador implemented travel restrictions whereby non-residents could enter NL only with exemptions. As the prevalence of COVID-19 was low at the time, it is likely that the travel restrictions substantially reduced the COVID-19 epidemic in NL. We fit a stochastic epidemic model to data describing the number of active COVID-19 cases in NL from March 14th – May 4th. We then forecast the distribution of outbreak sizes over the 9 weeks subsequent to May 4th, with and without the travel restrictions, and for physical distancing scenarios ranging from a 40% to 70% reduction in the daily contact rate relative to pre-pandemic levels. The implementation of travel restrictions in NL resulted in a 20-fold decrease in the number of cases over the subsequent 9 weeks. Assuming that physical distancing reduced the contact rate to 55% of its pre-pandemic level, the median number of cases without the travel restrictions was 19 and with the travel restrictions was 1. Using epidemic modelling, we show how the NL outbreak would have unfolded had travel restrictions not been implemented. The few COVID-19 cases reported following the implementation of travel restrictions is not evidence that the travel restrictions were unnecessary; rather our modelling shows that the travel restrictions are a plausible reason why there were few reported cases in NL in the 9-weeks after May 4th.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Atlantic GR Seminar: Nicholas Layden (Dalhousie) and Sharmin Akhter (MUN)
2020-08-26 13:00 - 14:00 (America/Halifax) | Zoom seminar
Geometric Horizons in the Szekeres Spacetime
Nicholas Layden (Dalhousie University)
A new conjecture for geometric horizons has been introduced which may provide a potential alternative to using apparent horizons and related surfaces for analyzing the dynamics of black hole spacetimes. In particular, using two examples of black hole formation in a collapsing universe in the Szekeres spacetime, the formation, evolution, and detection of geometric horizons are shown. In addition, a function for detecting apparent horizons in the Szekeres spacetime is also considered, and it is shown that the apparent horizon in the Szekeres model, is in fact, a geometric horizon. The Cartan-Karlhede algorithm for determining local equivalences of spacetimes is used to compute an invariant frame in the Newman Penrose frame formalism, and Cartan invariants derived from the spacetime in this frame are shown to detect the geometric horizons under various conditions on the curvature tensors of the spacetime. One model for primordial black hole formation and another for galactic black hole formation are considered with non-zero cosmological constants, generalizing work published previously on these models with zero cosmological constant. Future work utilizing geometric horizons may provide benefits in gravitational wave research involving black hole mergers.
Rigidity of Marginally Outer Trapped Surfaces in RNdS Spacetime
Sharmin Akhter (Memorial University of Newfoundland)
We investigate the rigidity of MOTS in four dimensional Reissner-Nordstrom-de Sitter spacetime. This is connected to the study of the first order derivative of stability operator (and hence the second derivative of outgoing null expansion). Since the stability operator has a zero eigenvalue in our case, we use the Lyapunov-Schmidt reduction to establish rigidity.
The Atlantic General Relativity 2020 online postdoc/student seminar series is in the tradition of the annual AGR meetings, providing a forum not only for students and postdocs to present their research and make professional contacts but also to facilitate connections and collaborations between all Atlantic Canadian relativists. The series is student-organized and includes all areas of classical and quantum gravity. Talks will occur on the last Wednesday of every month, with each session consisting of two 30 minute talks. If you would like to attend, please email the organizers for connection details.

AARMS COVID-19 Seminar: Acadia Covid Modelling Group
2020-08-12 15:00 - 16:30 (America/Halifax) | Zoom seminar
Talk 1: Estimating underreporting of COVID-19 cases using fatality data
Led by Margaret Hopkins
Talk 2: Individual-based modelling of COVID-19 on the Acadia University campus with a realistic contact structure
Led by the Acadia Modelling Group
The Acadia Modelling Group consists of D. Currie, C. Hooper, M. Hopkins, R. Karsten, Y. Li, F. Mendivil, and H. Teismann. This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Café Mathématique: What is a model of COVID-19?
2020-08-12 13:00 - 15:00 (America/Halifax)
Café Mathématique is a free, online public forum where anyone can learn how math underpins our understanding of the COVID-19 pandemic. Hear from a panel of experts at universities across Canada as they answer the question, “What is a model of COVID-19?”, followed by a lively discussion where audience members are encouraged to ask questions and explore ideas about modelling the pandemic.
Panelists:

Javier Sanchez, Associate Professor, Epidemiology, University of Prince Edward Island
David Buckeridge, Professor, Epidemiology, Biostatistics & Occupational Health, McGill University
Ashleigh Tuite, Assistant Professor, Dalla Lana School of Public Health, University of Toronto
Caroline Colijn, Professor and Canada 150 Research Chair, Mathematics, Simon Fraser University

Moderators:

Jane Heffernan, Professor, Mathematics and Statistics, York University
Jude Kong, Assistant Professor, Mathematics and Statistics, York University

Register at http://www.fields.utoronto.ca/activities/20-21/cafe-math-covid

PIMS/AARMS WORKSHOP ON New Trends in Localized Patterns in PDEs
2020-08-10 - 2020-08-14 | PIMS at UBC and SFU, Vancouver, British Columbia, Canada
Mathematical Theory and Applications to Physics, Biology and the Social Sciences– a Conference in Honour of the 60th Birthday of Michael J. Ward
Localized spatial-temporal patterns commonly occur for various classes of linear and nonlinear diffusive processes. In particular, they occur in reaction-diffusion (RD) systems modeling quorumsensing (QS) behavior in biological systems, the initiation of root-hair tip formation in plant cells, and the spatial distribution of urban crime. Localization behavior also occurs in the biophysical context of calculating first passage statistics for a Brownian walker in a region with localized traps, and in ecology for calculating the persistence threshold of a species in a patchy landscape. In recent years, we have witnessed an explosion of many new and exciting developments in the theory and applications of localized solutions in PDEs. Many new frontiers have opened while new connections between old fields have been discovered.
This workshop will highlight Prof. Ward’s influential contributions to the mathematics and applications of localized solutions to PDEs. It brings together his students, colleagues and collaborators in a celebration of Prof. Ward’s 60th birthday. Over his long career, Prof. Ward has made numerous invaluable contributions to many areas of applied mathematics, including fluid dynamics, metastability, reaction-diffusion equations, cell biology and pattern formation. He has supervised 13 doctoral students and also mentored numerous postdocs and undergrads.

Math Kitchen Party: organized by Connie Stewart (UNB Saint John)
2020-08-06 20:00 - 21:00 (America/Halifax) | Zoom seminar
Hierarchical linear model with power law function on transmission of COVID-19 in Italy: Modelling and regression analysis
Youtian Hao (UNB Fredericton)
COVID-19 growth data were typically collected from each region of a country, and the transmission rate usually varies in different area. By adopting a power law with exponential cutoff function into hierarchical linear model, it becomes possible to reveal the relationship between COVID-19 transmission rate and some regional level covariates of interest. A two-level hierarchical linear model is constructed, where the first level includes a PLEC function with Poisson link, and the second level incorporates parameters from level-one with regional level covariates. Modelling and regression analysis approach is implemented based on the model with Italian COVID-19 transmission data.
Why Most Published Research Findings Are False
Hugh Chipman (Acadia)
Many scientific studies declare a “statistically significant” result but then can’t be replicated. What’s going on? Can we no longer trust statistics? Is this the end of the world as we know it?
Musical Guests

Michele Millar (MSVU)
Augusto Suarez Garcia (UNBSJ)

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

AARMS COVID-19 Seminar: James Watmough (UNB Fredericton)
2020-08-05 15:00 - 16:30 (America/Halifax) | Zoom seminar
Simple epidemic models with importation
Many provinces and territories have controlled the spread of SARS-COV-2 within their borders and are now weighing the risks and benefits of reopening internally and externally. In this week’s seminar I’ll lay out some groundwork for this comparison using variations on the simple SIR model.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Diversity in Mathematics 2020
2020-08-04 - 2020-08-14 | Vancouver
We propose a multi-year, multi-level approach to promoting diversity and inclusivity in STEM. The annual two-week program encompasses concurrent, partially overlapping events targeting two distinct groups:
(a) A summer school for top undergraduate women in Canada and the northwest United States, specializing in mathematics or a related STEM field such as computer science, physics and statistics. The program will expose them to the many facets of the mathematical sciences in an intense two week immersion. Career opportunities in academia and industry will be given equal emphasis. We hope to encourage these gifted young women to continue on to graduate school, an arena where women are still seriously under-represented.
(b) An interactive math camp that runs as a companion program to the summer school. The target demographic here involves high school students in grades 10 and 11, irrespective of gender, with an aptitude for science and mathematics but from under-privileged groups.

Atlantic GR Seminar: Sharmila Gunasekaran Gnanam (MUN) and Robert Santacruz (UNB)
2020-07-29 13:00 - 14:00 (America/Halifax) | Zoom seminar
Slow decay of waves in gravitational solitons
Sharmila Gunasekaran Gnanam
Memorial University of Newfoundland
Gravitational solitons are globally stationary horizonless asymptotically flat spacetimes. In this talk, I will describe the methodology used to prove that massless scalar waves in a particular family of soliton spacetimes decay very slowly. The proof involves the construction of quasimodes which are approximate solutions to the wave equation. This slow decay can be attributed to the stable trapping of null geodesics and is suggestive of instability at the nonlinear level. This is joint work with Hari Kunduri.
Quantizing gravity is not that hard if you know how: An undergraduate guide to black holes
Robert Santacruz
University of New Brunswick
It is expected that singularities appearing in GR are to be resolved in a theory of Quantum Gravity. In the context of Loop Quantum Gravity, the Big Bang singularity is replaced by a bounce and so one would assume that this can be translated into Black Holes. In this talk I will explain you how to find an effective model for Schwarzschild black hole by using Loop Quantum Cosmology techniques and, the best part is, you only need Hamiltonian Mechanics!!
The Atlantic General Relativity 2020 online postdoc/student seminar series is in the tradition of the annual AGR meetings, providing a forum not only for students and postdocs to present their research and make professional contacts but also to facilitate connections and collaborations between all Atlantic Canadian relativists. The series is student-organized and includes all areas of classical and quantum gravity. Talks will occur on the last Wednesday of every month, with each session consisting of two 30 minute talks. If you would like to attend, please email the organizers for connection details.

Math Kitchen Party: organized by Asmita Sodhi (Dalhousie) and Rebecca McKay (UNB Saint John)
2020-07-23 20:00 - 21:00 (America/Halifax) | Zoom seminar
Tips and Tricks for Online Teaching
Rebecca McKay (UNB Saint John)
Many of us will be teaching with some online component in Fall 2020. In this brief talk, I will outline some tips and tricks for moving mathematics and statistics course activities into the virtual environment.
Open Discussion Session: 8:30-8:50
This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

Math Kitchen Party: organized by Danielle Cox (Mount Saint Vincent)
2020-07-16 20:00 - 21:00 (America/Halifax) | Zoom seminar
Modelling correlated count data-can I delete the zeroes?
Gary Sneddon (Mount Saint Vincent)
Correlated count data with excess zeroes arise in a number of applications. We will discuss 3 motivating examples, and some approaches to modelling these type of data. Covid-19 may be mentioned, so be prepared. This is joint work with Tariqul Hasan and Renjun Ma of UNB (Fredericton).
The Shooter’s Hill Decorative Tiles: Combinatorics as Art
Karyn McLellan (Mount Saint Vincent)
This talk will explore some of the art and mathematics inspired by a mistakenly (?) placed stone tile on a terraced house in London. A set of 70 Truchet-type tiles are the building blocks for various art pieces, including an inkle loom weaving. In particular, we are interested in whether or not we can weave an overlapping strip containing all 70 tiles exactly once, and if so, how many such strips exist. Other combinatorial properties of the tiles are examined as well. Joint work with Eva Knoll(UQAM) and Danielle Cox (MSVU).
Musical Guests

Sean & Tessa Sneddon

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

AARMS COVID-19 Seminar: Sana Jahedi (UNB) and James A. Yorke (Maryland)
2020-07-15 15:00 - 16:30 (America/Halifax) | Zoom seminar
When the best pandemic models are the simplest
As a pandemic of coronavirus spreads across the globe, people debate policies to mitigate its severity.
Many complex, highly detailed models have been developed to help policy setters make better decisions. However, the basis of these models is unlikely to be understood by non-experts.
We describe the advantages of simple models for covid-19. We say a model is “simple’’ if its only parameter is the rate of contact between people in the population. Such models can be understood by a broad audience, and thus can be helpful in explaining the policy decisions to the public. They can be used to evaluate outcomes of different policy strategies. However, simple models have a disadvantage when dealing with inhomogeneous populations.
To augment the power of a simple model to evaluate complicated situations, we add what we call “satellite’’ equations that do not change the original model.
To compare simple models with complex models, we introduce our “slightly complex’’ Model J. We find the conclusions of simple and complex models can be quite similar. But, for each added complexity, a modeler may have to choose additional parameter values for which there is often little rationale but that can have a big impact on predictions. Our simulations suggest that the added complexity offers little predictive advantage.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

CMS COVID-19 Research and Education Meeting (CCREM)
2020-07-13 - 2020-07-16 | Virtual Meeting
The CMS had to postpone the 2020 CMS Summer Meeting planned for this June due to the COVID-19 pandemic. Since we cannot hold a meeting in person, the CMS still wants to provide a virtual platform for mathematicians to come together and learn during this difficult time. We feel that a meeting focused on the changes caused by COVID-19 to the way we plan, teach and do research would be of great benefit to the Canadian mathematical community.
The session will cover NSERC’s response to the COVID-19 pandemic including new funding opportunities for researchers, changes in policies for NSERC Discovery grants and scholarship and fellowship programs. NSERC staff will also be answering questions regarding the coming Discovery grant competition.

Quantum Gravity 2020
2020-07-13 - 2020-07-17 | Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, Ontario, N2L 2Y5, Canada
The conference “Quantum Gravity 2020“ has a deliberately broad scope. We aim to include participants from all current approaches to quantum gravity, as well as researchers working on the phenomenology of quantum gravity. The main goal of the meeting is to assess the progress made and to constructively and openly discuss open questions in our understanding of quantum gravity.
A second goal is to work towards combining the insights gained in the various approaches. In its overall goal as well as the format, this conference will differ from more specialized meetings that focus on specific quantum-gravity approaches.
We hope that this inaugural conference “Quantum Gravity“ can make a contribution to bridging the gaps between quantum gravity approaches, and bring the entire community together for a constructive and fruitful exchange.

Math Kitchen Party: organized by Daniele Turchetti (Dalhousie)
2020-07-09 20:00 - 21:00 (America/Halifax) | Zoom seminar
Number Theory in Quantum Mechanics
Suresh Eswarathasan (Dalhousie | 8:00-8:20)
In this lecture, I will discuss some concrete connections between two seemingly disparate fields: number theory and quantum mechanics. The first 10 minutes will be spent giving some “standard” facts in these disciplines before spending the last 10 minutes on the implications of the Sum of Two Squares Theorem (or rather, its refinements) on certain quantum waves.
Getting Back to Your Roots
Jason Brown (Dalhousie | 8:40-9:00)
Polynomials arise in various combinatorial settings, and their roots are of interest for both applied and theoretical reasons. In this talk I’ll provide a few examples, and show how exploring the nature and location of the roots can connect us back to giants of the past, such as Newton, Gauss, Hermite and Julia.
Musical Interlude

Dorette Pronk (Dalhousie)

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

AARMS COVID-19 Seminar: Matthew Betti (Mount Allison)* and Jane Heffernan (York)
2020-07-08 15:00 - 16:30 (America/Halifax) | Zoom seminar
Scenario-based modeling of healthcare demand and PPE usage during the COVID-19 pandemic
One of the big risks during the current pandemic is stress and overburdening of the healthcare system, and a possible scarcity of resources. We will present a three module model that projects possible epidemic outcomes and subsequently measures healthcare demand and PPE usage for different jurisdictions across Canada. We present as well a simple model which we fit to current cases with some novel sampling techniques which allows us to narrow possible trajectories which can then be fed into the healthcare demand and PPE modules. We show results for possible outcomes from each of our three modules and from our fitting techniques.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Math Kitchen Party: organized by Branimir Cacic (UNB Fredericton)
2020-07-02 20:00 - 21:00 (America/Halifax) | Zoom seminar
The Oberwolfach Problem
Andrea Burgess (UNB Saint John)
The Oberwolfach Problem was posed by Ringel as a seating problem: people attend a conference in Oberwolfach, where the dining room has round tables of sizes (with ). Is it possible to devise a seating plan over successive dinners in which each person sits next to each other person exactly once?
In graph-theoretical terms, the Oberwolfach Problem asks whether, given a 2-factor of order , the complete graph can be decomposed into copies of . In this talk, we present solutions of the Oberwolfach Problem obtained via graceful labellings. This is joint work with Peter Danziger (Ryerson) and Tommaso Traetta (Brescia).
The Unitary Birkhoff-von Neumann theorem
Stijn De Baerdemacker (UNB Fredericton)
Birkhoff has shown that the doubly stochastic matrices can be written as a weighted sum over the permutation matrices of the same dimension. I will show that a similar theorem holds for unitary matrices with equal linesum, and talk about applications in quantum computing.
Musical Guests

TBA

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

Math Kitchen Party: organized by Patrick Reynolds (UNB Fredericton)
2020-06-25 20:00 - 21:00 (America/Halifax) | Zoom seminar
Source Sink Diffusion
Danielle Cox (MSVU)
We will introduce the diffusion process on graphs with the addition of sources and sinks. In particular, we will provide some results regarding the periodicity of the process. This is joint work with Todd Mullen (Dalhousie University), Shayne Breen (MSVU), Emily Wright (MSVU) and Jesse Preston (MSVU).
More Fun with the Sierpinski Relatives
Tara Taylor (StFX)
The Sierpinski gasket is a well-known fractal that can be described as the attractor of an iterated function system (IFS) that maps the unit square to three smaller squares (scaled down by 2). A Sierpinski relative is a fractal that is an attractor of an IFS that maps the unit square to three smaller squares but also involves the symmetries of the square. This is an interesting class of fractals because they all have the same fractal dimension but different topologies. Some are totally disconnected, some are disconnected with straight line segments, some are simply-connected, and some are multiply-connected. This very brief talk will explore different ways to compare and characterize the fractals that go beyond the fractal dimension. We will focus on the subclass that are disconnected with straight line segments, and this will involve convex hulls and epsilon-hulls.
Musical Guests

Patrick Reynolds

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

AARMS COVID-19 Seminar: JC Loredo-Osti (MUN)
2020-06-24 15:00 - 16:30 (America/Halifax) | Zoom seminar
The Euler’s method and the Gillespie algorithm to simulate a stochastic SIR model (part 2)
JC Loredo-Osti (MUN)
The second part of this presentation will be used to talk about some example of extensions to the stochastic SIR model. We will start with adding compartments that leave the fundamental structure of the model unchanged, like the ones that add a latent class or add compartments to accommodate for metapopulations, as well as incorporating the serial-time distribution to model the infectious process.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

AARMS CRG conference on Computational Aspects in Finance and Actuarial Sciences
2020-06-19 - 2020-06-20 | University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
The AARMS CRG Conference on Computational Aspects in Finance and Actuarial Sciences will be held June 19-20th, 2020 in PEI, Canada. This conference is mainly hosted by the Atlantic Association for Research in Mathematical Sciences (AARMS) collaborative research group (CRG) and the School of Mathematical and Computational Sciences (SMCS) at University of Prince Edward Island (UPEI), Canada, and is a unique venue that brings together leaders in finance, and actuarial sciences, across disciplines, and across borders, tackling very important and timely topics in finance and actuarial sciences. Our intention for this conference is to have a broad scope in terms of applications in Finance and Actuarial Sciences but we would like to put emphasis on numerical and computational issues (including trendy topics such as machine learning algorithms in finance and insurance, but also more traditional methods such as numerical solutions for PDEs, Monte Carlo simulations, etc). The conference will include a dynamic program with high quality speakers focusing on innovative research, policy discussions, and business challenges and successes.

Math Kitchen Party: organized by Tim Alderson (UNB Saint John)
2020-06-18 20:00 - 21:00 (America/Halifax) | Zoom seminar
Pokemon in the City
Danny Dyer (Memorial University of Newfoundland)
When playing Pokemon Go, trying to catch all the Pokemon in a big, grid like city is difficult, but can be discussed in terms of the watchman number of grid graphs. We present some bounds for these graphs, and argue that is better to play Pokemon Go on a toroidal space station. Gotta catch ‘em all! [Joint work with Jared Howell, Grenfell Campus, Memorial University.]
Passing the buck: a chip firing game
M.E. Messenger (Mount Allison)
Suppose a group of people sitting in a row, each take out their wallets and count their money. Then the richest person (or people), pass a dollar to their neighbours. Lather, rinse, repeat. We will discuss some of the dynamics of such a process and present a few results. We’ll also pose some questions and welcome solutions from the audience. [Joint work with Jared Howell, Grenfell Campus, Memorial University.]
Musical Guests

Jason Brown (Dalhousie)
Iain Beaton (Dalhousie)

This is a virtual zoom meeting. If you would like to attend, please email the organizers for connection details.
[more information about the Math Kitchen Party summer talk series]

AARMS COVID-19 Seminar: Mathieu Chalifoux (Government of New Brunswick)
2020-06-17 15:00 - 16:30 UTC | Zoom seminar
Planning for Covid-19: Government’s informational needs in a time of uncertainty
Mathieu Chalifoux (Government of New Brunswick)
In this presentation, we will go over three questions that have recently been posed to the mathematical sciences community in Fredericton, New Brunswick as a means to better understand and plan for the incidence of COVID-19 in the coming months. Further discussion will ensue with all participants as a means to discuss what type of information is useful to governments during this ongoing pandemic.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Queer and Trans Mathematicians in Combinatorics - CANCELLED
2020-06-12 - 2020-06-14 | Toronto, Toronto, Ontario, Canada
The Queer and Trans Mathematicians in Combinatorics conference (QTMC) is a first-ever event in combinatorics specifically aimed at queer and trans mathematicians. It aims to bring together and support queer and trans combinatorists. The conference promotes a supportive and active collaborative environment for the participants and aims to bring about visibility to an otherwise underrepresented invisible minority in the combinatorics community. The QTMCis heavily geared toward students, postdocs and early career mathematicians who are queer and/or trans.

AARMS COVID-19 Seminar: JC Loredo-Osti (MUN) - POSTPONED
2020-06-10 15:00 - 16:30 (America/Halifax) | Zoom seminar
The Euler’s method and the Gillespie algorithm to simulate a stochastic SIR model (part 2)
JC Loredo-Osti (MUN)
The second part of this presentation will be used to talk about some example of extensions to the stochastic SIR model. We will start with adding compartments that leave the fundamental structure of the model unchanged, like the ones that add a latent class or add compartments to accommodate for metapopulations, as well as incorporating the serial-time distribution to model the infectious process.
This seminar has been postponed due to #ShutDownSTEM. A new date will be announced soon.

CMS Special Session: Designs and Codes
2020-06-05 - 2020-06-08 | University of Ottawa, 75 Laurier Ave E, Ottawa, Ontario, K1N 6N5, Canada
Designs and codes are very active areas of research in combinatorics. There have been numerous breakthroughs in recent years, such as the existence proof for Steiner systems for arbitrary values of t. Research in designs, codes and their interaction includes both mathematical and algorithmic questions. Proofs encompass both constructions and probabilistic methods, and employ diverse mathematical techniques from algebra, number theory, graph theory, etc. In addition, there are numerous applications, in areas such as cryptography, in which designs and codes play an important role.
This session brings together leading and emerging researchers in the field to share their recent results, techniques, and applications.Univ

CMS Special Session: Graph Decompositions
2020-06-05 - 2020-06-08 | University of Ottawa, 75 Laurier Ave E, Ottawa, Ontario, K1N 6N5, Canada
Decomposition of graphs, particularly decomposition into cycles, is a vibrant area of research in the intersection of graph theory and the theory of combinatorial designs. For almost two centuries, professional as well as amateur mathematicians have been intrigued by problems that are easy to state yet extremely difficult to solve. In the last couple of decades, we have witnessed an explosion of new results, including new techniques and solutions to many long-outstanding problems; however, many fundamental problems remain unsolved.
The session in Graph Decompositions at the CMS 75th Anniversary Summer Meeting will bring together leading and emerging researchers in the field to share their recent results, techniques, and applications.
This session is dedicated to Louise Duffield Cummings, a Canadian-born mathematician who contributed influential results in the study of triple systems. The year 2020 marks the 150th anniversary of her birth.

CMS Special Session: Numerical Analysis and Computational Geophysics
2020-06-05 - 2020-06-08 | University of Ottawa, 75 Laurier Ave E, Ottawa, Ontario, K1N 6N5, Canada
Modelling the composition and the dynamic of the Earth subsurface is a difficult problem, which requires the implementation of efficient numerical methods for partial differential equations and of advanced statistical methods for analyzing experimental data as well as comparing them with synthetic data produced by mathematical models. In this session we will bring together mathematicians and geophysicists to present and discuss some trends in geophysical modelling and computational geophysics.
Topics will include the following:
-Domain decomposition methods (optimized Schwarz methods) and their applications to geophysics
-Mimetic finite difference discretization methods and their application to gravity and magnetotelluric methods in geophysics
-Mathematical and statistical methods for seismic wavefield inversion
-Computational software for simulation and parameter estimation in geophysics

AARMS COVID-19 Seminar: JC Loredo-Osti (MUN)
2020-06-03 15:00 - 16:30 (America/Halifax) | Zoom seminar
The Euler’s method and the Gillespie algorithm to simulate a stochastic SIR model (part 1)
JC Loredo-Osti (MUN)
In this presentation, we will discuss the implementation of the two more common procedures to simulate a stochastic compartmentalised epidemic model, the Euler’s method and the Gillespie algorithm. We will also talk about extensions to the stochastic SIR model, as for example, the two ways to include a compartment for asymptomatic cases as well as extensions to account for a non-homogeneous process to accommodate for a non-exponential serial time distribution.
This is a virtual zoom seminar. If you would like to attend, please email the organizers for connection details.

Connecting Women in Mathematics Across Canada - CANCELLED
2020-06-03 - 2020-06-04 | Carleton University, 1125 Colonel By Dr., Ottawa, Ontario, K1S 5B6, Canada
The CWiMAC workshops are developed and organized in coordination with the CMS Women in Mathematics Committee. The purpose of these workshops is to support the career development of junior women academics in the Canadian mathematics community. These events have been highly successful in the past. The goal is to hold this workshop roughly every two years. The last CWiMAC workshop was held in 2014, and it is timely to organize another one. This workshop will be held at the University of Ottawa on the evening of Wednesday, June 3 and all day on Thursday, June 4, 2020, immediately preceding the 75th Anniversary Meeting of the Canadian Mathematical Society in Ottawa. The goal of this event is to provide female-identified researchers in mathematics skills to help them succeed, to ensure their continued success and retention in mathematics.

Calculus Instruction in Atlantic Canada Symposium 2020 - CANCELLED
2020-05-29 - 2020-05-30 | Saint Francis Xavier University, 4130 University Avenue, Antigonish, Nova Scotia, B2G 2W5, Canada
Calculus Instruction in Atlantic Canada Symposium 2020 will have the theme of Helping High School and University students to Deepen Their Understanding of Calculus. It will be held at STFX on May 29-30, 2020 and Atlantic Canadian high school educators, as well as university educators will be invited. The goal of this symposium is to give participants the opportunity to hear from experts and engage in discussions regarding ways to help students with conceptual understanding of calculus through specific examples and applications. We will also address feedback from students. The structure of the symposium will include plenary talks and a panel of university and high school educators. There will be small group discussions, as well as contributed talks.
