## Postgraduate Seminars

### Spring 2018

These seminars (unless otherwise stated) will take place on **Thursdays at 1pm in Maths Room 706 **(25 Gordon Street) on an (almost) weekly basis ** - **see the map for further details. Talks are being given by 2nd and 3rd year Mathematics PhD students for PhD students.

### 11 January 2018

#### Speaker: Atheeta Ching

**Supervisor(s): Dr Stephen Baigent**

###### Title: Atheeta Vs. Predator

**Abstract:**

Competitive
population systems are special in that there exists a unique, invariant
manifold with some great properties! For example, all solution trajectories in
the phase plane are actually asymptotic to one on this manifold meaning all
non-trivial behaviours occur on this manifold. Our work explores if this still
exists in systems where the species co-operate, or perhaps one becomes a
predator/parasite...

### 18 January 2018

#### NO SEMINAR

### 25 January 2018

#### Speaker: Emily Maw

**Supervisor(s): Dr Jonny Evans**

###### Title: Vanishing cycles

**Abstract:**

I will talk about singularities, and how we can
understand them via their so-called vanishing cycles. This topic beautifully
illustrates how symplectic topology links algebraic geometry to
low-dimensional topology. We will meet some basic examples, and hopefully
get to "pinwheels", which are what I am studying! The talk will be
highly nontechnical and mostly involve pictures, so should be accessible to all
😊

### 01 February 2018

#### Speaker: Yongjo Lee

**Supervisor(s): Dr Christian Boehmer**

###### Title: Soliton deformational wave solutions for nonlinear Cosserat micropolar elasticity

**Abstract:**
After brief introduction of classical continuum and micro-continuum
theory, I will show you how the equations of motion can be obtained from
various energy functionals. In turn, these equations of motion lead to the
soliton solutions via so-called double sine-Gordon equation. And I will show
how the solutions can determine the overall deformational behaviour.

### 08 February 2018 in Room 500

#### Speaker: Sean Jamshidi

**Supervisor(s): Prof Ted Johnson**

###### Title: Coastal outflows into a buoyant layer

**Abstract:**

River
water discharging into the ocean is a major source of sediments, nutrients and
pollutants, and as such can both help and hinder the extraordinary variety of
life that blooms in coastal regions. It is therefore important for
conservationists and oceanographers to understand where river water goes, and
the mechanisms by which it is transported. In this talk, I will provide an
overview of these mechanisms, focussing particularly on the role played by
potential vorticity. I will try to provide as much physical intuition as
possible, while also giving a flavour of the mathematics that has been used to
study this interesting and rich problem.

### 15 February 2018

#### Speaker: Matteo Capoferri

**Supervisor(s): Prof Dmitri Vassiliev**

###### Title: TBC

**Abstract:**

TBC

### 22 February 2018

#### Speaker: TBC

**Supervisor(s): TBC**

###### Title: TBC

**Abstract:**

TBC

### 01 March 2018

#### Speaker: TBC

**Supervisor(s): TBC**

###### Title: TBC

**Abstract:**

TBC

### 08 March 2018

#### Speaker: TBC

**Supervisor(s): TBC**

###### Title: TBC

**Abstract:**

TBC

### 15 March 2018

#### Speaker: TBC

**Supervisor(s): TBC**

###### Title: TBC

**Abstract:**

TBC

### 22 March 2018

#### Speaker: TBC

**Supervisor(s): TBC**

###### Title: TBC

**Abstract:**

TBC