The Ottawa Mathematics Conference has showcased the academic talent of the capital region for over 10 years. Previous Keynote speakers have been:

**Maia Fraser (University of Ottawa)**

**Title**: Persistence modules: from Applied to Pure Math

**Abstract**: The first notions of topology were invented to solve real world problems, for example in Euler’s work in the 1700’s. Later, topology grew into an important area of Pure Math in its own right. Applications continued however and I will describe some of them, in particular the recent tool of persistent homology developed in topological data analysis. Interestingly this tool in turn can be fruitfully applied within Pure Math. I discuss some new applications, including persistence modules in symplectic geometry.

**Pieter Hofstra (University of Ottawa)**

**Title**: The Joy of Abstraction

**Abstract**: Mathematics comes in many different flavours, ranging from very concrete and problem-driven, to very abstract and conceptual. One possible reason for introducing abstract concepts is laziness: instead of doing similar problems or proofs over and over again (perhaps with minor variations), one tries to develop a more general theory that captures all examples of interest. Another reason is that viewing a mathematical phenomenon on the “right” level of abstraction often leads to unexpected insights or connections with other concepts. In this talk, I will explain how the language of categories is particularly suitable to drawing out the essence of mathematical ideas, and to uncover new connections between seemingly unrelated areas of mathematics.

**Brett Stevens (Carleton University)**

**Title**: Tournament design, geometry and non-linear functions

**Abstract**: A video game tournament is held with 64 participants playing 8 games over 8 rounds. In each round, 8 people play each game against each other and no one plays the same game twice. We would like to find a tournament schedule that maximizes the number of pairs of people who play against each other in some round and minimizes the number of pairs who play against each other more than once. We set up this optimization problem as a combinatorial design. We find various solutions built from lines and ovals in finite projective planes and highly non-linear functions over finite groups. We discuss the trade-offs between the two objectives and other properties such as symmetry. the last group of solutions has some connections to Costas arrays and cryptosystems resistant to differential cryptanalysis.

**Alistair Savage, University of Ottawa**

**Title:** A gentle introduction to categorification

**Abstract:** This will be an expository talk concerning the idea of categorification and its role in representation theory. We will begin with some very simple yet beautiful observations about how various ideas from basic algebra (monoids, groups, rings, representations etc.) can be reformulated in the language of category theory. We will then explain how this viewpoint leads to new ideas such as the “categorification” of the above-mentioned algebraic objects. We will conclude with a brief synopsis of some current active areas of research involving the categorification of quantum groups. One of the goals of this idea is to produce four-dimensional topological quantum field theories. Very little background knowledge will be assumed.

**Yves Bourgault, University of Ottawa**

**Title:** Understanding the heart – problems, models and methods

**Abstract:** The talk will cover the challenges and approaches associated with building mathematical models of the heart. Topics covered include how to get heart geometries from medical imaging and ways to understand the electrical and mechanical activity of the heart.

**Paul Mezo**, **Carleton University**

**Title:** Number theory meets harmonic analysis

**Abstract:** Both number theory and harmonic analysis are colossal areas in mathematics, so they overlap in more ways than one. Our modest aim is to sketch a path in each area and arrive at a particular point of overlap. In the world of number theory, our path is in the direction of modular forms. In harmonic analysis we follow representations of locally compact groups. The technical core of this talk is to explain how (cuspidal) modular forms may be converted into (automorphic) representations. In making this conversion, an immense potential for generalization becomes apparent.