Seminar

The geometry of continued fractions has been studied by numerous mathematicians, in particular through the Farey triangulation and the Ford circles. Recently in 2020, a deformation of continued fractions has been proposed by Morier-Genoud and Ovsienko in algebraic terms. In this talk, I shall present the geometry behind these deformations: the deformed Farey triangulation and a 1-dimensional circle fractal representing rational numbers. An extension to complex numbers leads to partial circle packings in 2d. Joint with Perrine Jouteur and Olga Paris-Romaskevich.

Illustration is a powerful and effective tool for exploring research questions in the theory of tiling — there’s no substitute for trying things out. We’ll show a few decades of our favorite drawings and give a live demo in Adobe Illustrator.

The Institut Henri Poincaré (in Paris) is currently hosting the trimester program "Illustration as a Mathematical Research Technique."  This month, once again, the seminar will live stream from a modified "Show and Ask" session that will take place at IHP.

The Institut Henri Poincaré (in Paris) is currently hosting the trimester program "Illustration as a Mathematical Research Technique."  This month, the seminar will live stream from a modified "Show and Ask" session that will take place at IHP.

In the course of his explorations of the visual representation of infinity, M.C. Escher created several prints in which tessellated figures spiral inward towards a limit in the centre of the design.  I present a pleasingly simple way to think about these spiral tilings, based on the exponential function in the complex plane, and connect it to a few other related ideas in mathematical art.

We present efficient computational methods for generating, visualizing, and interactively exploring symmetric patterns in Euclidean, spherical, hyperbolic, and inversive geometries.  The algorithms are implemented in the open-source software package SymmHub, designed as a platform for experimentation and research in geometry.
 

We’ll start from a very straightforward visual of the Riemann Zeta function as a sum, and proceed to alternate ways to interpret it so that we can make sense of it in the region of divergence. From there, we can play around with how it interplays with the sum over (1/k)(1/p^{ks}) on those same spots, where zeta zeros look like poles.

I give many outreach lectures to undergraduates explaining my research in knot theory and braid group representation theory. I will show the illustrating math community how I use Math-Dance videos in my outreach lectures.

Drawing from the speaker’s work as well as the work of many other mathematical artists, particularly fiber artists, we will discuss the relationship between choice of medium and illustration of mathematical concepts.

The Dodecahedron is to the 120-Cell as the Klein Quartic is to the 350-Cell.  The latter two are examples of "abstract regular polytopes."  I'm going to share adventures trying to grasp understanding of these abstract objects, an asymptotic journey.  I'll muse about how illustration helps us get past walls of personal understanding, and allows us to connect with each other for sharing abstract ideas.  Solidarity!