# Past Events

E.g., Aug. 14, 2022

### Aravind Asok

University of Southern California
On P^1-stabilization in unstable motivic homotopy theory

June 1, 2022

I will discuss joint work with Tom Bachmann and Mike Hopkins regarding an analog of the Freudenthal suspension theorem in unstable motivic homotopy theory. To motivate the result, I will quickly introduce the unstable motivic homotopy category and discuss some concrete applications. Time... Read more

• Algebra and Algebraic geometry

### Caroline Colijn

SFU
Niven Lecture: Genomic Epidemiology in SARS-CoV-2: new models and challenges

May 31, 2022

UBC Mathematics Building, Room 100

Scientists around the world have sequenced over 2 million SARS-CoV-2 genomes in an effort to monitor and understand the evolution and transmission of this virus. Virus sequences can help us understand the emergence of new variants with new phenotypes, track the virus' geographical movements and... Read more

### Ruixiang Zhang

UC Berkeley
A stationary set method for estimating oscillatory integrals

May 19, 2022

https://ubc.zoom.us/j/68361900578?pwd=UkNHUzZMMkZoT0VJOFlVSWhDR0gzQT09

Given a polynomial $P$ of constant degree in $d$ variables and consider the oscillatory integral $$I_P = \int_{[0,1]^d} e(P(\xi)) \mathrm{d}\xi.$$ Assuming $d$ is also fixed, what is a good upper bound of $|I_P|$? In this talk, I will introduce a stationary set'' method that gives an upper... Read more

• Harmonic analysis

### Luca Ciandrini

U. Monpellier
Modelling mRNA translation: from the individual transcript to the impact on cellular physiology

May 18, 2022

Zoom - contact Katie Faulkner for link

One of the greatest challenges in biophysical models of translation is to identify coding sequence features that affect the rate of translation and therefore the overall protein production or the cellular growth rate.

I will first introduce a power series method to solve a translation... Read more

• Mathematical Biology

### Yumeng Ou

University of Pennsylvania
Unit distance type problems for point configurations in fractal sets

May 12, 2022

https://ubc.zoom.us/j/62198385847?pwd=ZWRTTGdQazU5cTE4bXlnK3duNGpBQT09

Abstract: The unit distance problem in discrete geometry studies the maximum number of times the unit distance can be achieved in a given point set. In 2015, D. Oberlin and R. Oberlin formulated an analogue of this problem in the continuous setting. In this talk, I'll discuss the problem and... Read more

• Harmonic analysis

### Navid Nabijou

Cambridge
From orbifolds to logarithms via birational invariance

May 9, 2022

Logarithmic and orbifold structures provide two different paths to the enumeration of curves with fixed tangencies to a normal crossings divisor. Simple examples demonstrate that the resulting systems of invariants differ, but a more structural explanation of this defect has remained elusive. I... Read more

• Intercontinental Moduli and Algebraic Geometry Seminar

### Nidhi Kaihnsa

Brown University
Multistationarity and Robustness in Reaction Networks

May 6, 2022

online

In biochemical reactions, the interaction between species is represented by directed graphs and their dynamics over time is modelled with ordinary differential equations. In this talk I will discuss recent results on two key dynamical properties of steady states of chemical reaction networks:... Read more

### Orit Peleg

Physical Computation in Insect Swarms

May 4, 2022

Our world is full of living creatures that must share information to survive and reproduce. As humans, we easily forget how hard it is to communicate within natural environments. So how do organisms solve this challenge, using only natural resources? Ideas from computer science, physics and... Read more

• Mathematical Biology

### Arend Bayer

The University of Edinburgh
Kuznetsov categories of Fano threefolds

May 2, 2022

I will give a survey of recent results on Kuznetsov categories of Fano threefolds of Picard rank one. These results give additional structure to their classification, and their moduli spaces. The techniques involved include moduli spaces of Bridgeland-stable objects, Brill-Noether statements,... Read more

• Intercontinental Moduli and Algebraic Geometry Seminar

### Fang-Hua Lin

NYU
Weak Averaging and StrAnalytic Properties of Elliptic Operators - A Revisit to Homogenization II

April 26, 2022

Zoom talk

Following the previous lecture on the Weak Averaging and Strong Analytic Properties of Elliptic Operators, we shall concentrate on estimates of geometric measures of nodal and critical point sets of solutions to such elliptic operators (with wildly oscillating coefficients). These are more... Read more

• Differential geometry
• Mathematical Physics
• Partial Differential Equations