# Well Wishes to the TMS Community, TMS AGM 2020-21 Results

The TMS Committee wishes everyone good health and safety through this difficult time. Thank you for being part of the 101-year-old TMS community. We are exploring options for remote events during Easter Term. The TMS AGM happened at the end of term, and a new committee for 2020-2021 was elected:

**President**: Misha Schmalian

**Vice President**: David Veres

**Secretary**: Michael Ng

**Junior Treasurer**: Arthur Ushenin

**Membership Secretary**: Valentin Imbach

**Constable**: –

We are indeed going through difficult *times*, and indeed, it’s hard to *take away* anything positive from these circumstances. So I’ll *add* a mathematical joke in the hope that this email might bring you some light entertainment… (answer below)

**Q: Why was the quadratic tree with negative discriminant unable to absorb nutrients?**

**A: Because it had imaginary roots!**

# TMS Symposium 2020

The TMS is back with its annual symposium, followed by the TMS Dinner. We have a fantastic line-up of speakers – from functional programming to colouring cubes, elliptic curves to basilisk lizards, and even using number theory in the Standard Model.

The full schedule can be found below and here: http://talks.cam.ac.uk/show/index/33747

**TMS Symposium – 7th of March 2020 – Winstanley Lecture Theatre**

**“I just want to be pure.” – graded monads for program analysis -Andrej Ivaskovic (computer laboratory).**

**An introduction to descent calculations on elliptic curves. -Jiali Yan (dpmms).**

**Gaussian Latent Tree Models and their Statistics. -Thomas Marge (statslab)**

**Intervals in the Hales-Jewett theorem. -Eero Raty (dpmms).**

**Multiply-Charged Vortices in Nonconservative Quantum Hydrodynamics. -Sam Alperin (damtp).**

**Locomotion: from basilisk lizards to bacteria. -Maria Tatulea-Codrean (damtp).**

**The importance of Diophantine equations in the Standard Model. -Philip Boyle-Smith (damtp).**

**‘Bubble Sucking Tadpoles and other Animals: Using Mathematical Models to**

**Explain Biological Phenomena’ – George Fortune (damtp)**

# The fluid-mechanics of CO2 sequestration – Prof. John Lister (DAMTP)

**Date and time:**Monday 24th February, 8:30PM

**Location:**Winstanley Lecture Theatre, Trinity College

**Professor John Lister (DAMTP) – The fluid-mechanics of CO2 sequestration**

**Abstract:**Atmospheric CO2 levels are rising rapidly due to anthropogenic emissions. One proposal to reduce emissions and mitigate climate change is to capture and compress the CO2 before emission, and pump it underground into deep porous rock formations such as old oil reservoirs. What happens next? Is this safe? I will describe some mathematical modelling of the resultant porous flows and illustrate the ideas with movies of

analogue laboratory experiments and numerical simulations.

# Using maths to clean-up our oceans – Dr Thomas Crawford

**Using maths to clean-up our oceans**

**Dr Thomas Crawford**

**Monday 20th Jan, 8:30PM, Winstanley Lecture Theatre**

This talk will provide a more in-depth look at the content of the Numberphile video: where does river water go?<https://www.youtube.com/watch?v=5mGh0r3zC6Y> Rivers are the major source of pollution in the oceans and if we are to clean them up, we first need to know

where the majority of the pollution is concentrated. By creating a mathematical model for river outflows –- verified by laboratory experiments and fieldwork –- the goal is to be able to predict which areas are most susceptible to pollution from rivers and thus coordinate clean-up

operations as effectively as possible.

# Some elements of algebraic geometry – Professor Caucher Birkar (DPMMS)

**Time update: this will start at 5:30PM. **This will now be in the **CMS, MR2**.

**Monday 2nd December, 5:30PM**

**Some elements of algebraic geometry**

**Professor Caucher Birkar (DPMMS)**

Algebraic geometry occupies a central place in modern mathematics. It has deep connections with various parts of mathematics. It is also deeply related to mathematical physics and has found applications in a wide range of topics. In this talk I will introduce some basics of algebraic geometry and then discuss some applications.

# TMS Call My Bluff

**Monday 25th November, 8:30PM**

**TMS Call My Bluff**

**You?**

An annual tradition, held by the TMS, in which a team of freshers test their lying capabilities against a team of other students in a reconstruction of the cult British TV show.

# High-dimensional data and the Lasso – Dr Rajen Shah (DPMMS)

** Monday 18th November, 8:30PM**

**High-dimensional data and the Lasso**

**Dr Rajen Shah (DPMMS) **

How would you try to solve a linear system of equations with more unknowns than equations? Of course, there are infinitely many solutions, and yet this is the sort of the problem statisticians face with many modern datasets, arising in genetics, imaging, finance and many other fields. What’s worse, our equations are often corrupted by noisy measurements! In this talk I will introduce a statistical method called the Lasso that has been at the centre of the huge amount of research that has gone into solving these problems.

# TMS Pub Quiz

**TMS Pub Quiz**

**Monday 4th October, 8:30PM**

**Junior Parlour, Trinity College**

# Is classical physics deterministic? – Professor Mihalis Dafermos (DPMMS)

**Is classical physics deterministic?**

**Professor Mihalis Dafermos (DPMMS)**