MSI Graduate Student Colloquium Series

MSI Graduate Student Colloquium

Interested in meeting your fellow graduate students and learning about their research? We are restarting for 2024 the informal colloquium for graduate HDR students to share interesting topics they’ve come across during their studies.

schedule Date & time
Date/time
1 Mar 2024 | 3 - 4pm
22 Mar 2024 | 3 - 4pm
19 Apr 2023 | 3pm - 19 Apr 2024 | 4pm
3 May 2024 | 3 - 4pm
person Speaker

Speakers

Antoine Gansemer
Nicholas Bohlsen
Qiyu Zhou
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Description

Interested in meeting your fellow graduate students and learning about their research? We are restarting for 2024 the informal colloquium for graduate HDR students to share interesting topics they’ve come across during their studies.  

The aim is to introduce everyone to a topic/problem and then discuss a model problem/example together. The talks will be casual and (if appropriate) provide a platform for further discussion about the model problem/example. 

Schedule

event

schedule03:00pm - 04:00pm

Geodesic flow and decay of traces on hyperbolic surfaces

  • Speaker: Antoine Gansemer

We will attempt to give an accessible, graduate level exposition of some recent work in a preprint on the “decay of traces on a hyperbolic surface under geodesic flow”.  We will motivate the spectral theoretical problem with visuals provided, we will give some ideas on the tools used including pseudodifferential operators on hyperbolic surfaces and decay of correlations estimates for hyperbolic dynamical systems.

event

schedule03:00pm - 04:00pm

Perturbations and the motion of the Earth

  • Speaker: Nicholas Bohlsen

Historically, the problem of calculating the motion of the planets in the solar system using Newtonian physics was one of great mathematical interest. Its study led to the development of numerous mathematical tools such as chaos theory but also topology itself, through Poincare for whom it was a motivating problem. In this talk I will introduce the Canonical Perturbation Theory which allows us to approximate the orbits of Hamiltonian dynamical systems which are close to integrable (exactly-solvable) systems. I will then demonstrate the use of this theory to solve for the motion of the Earth around the sun under the perturbation from Jupiter's gravity.

event

schedule3 - 4pm

The classical Hawking-Penrose singularity theorem

  • Speaker: Qiyu Zhou

Abstract: One of the most important predictions of the general theory of relativity (GR) is that the physical spacetime admits at least one singularity. There are three singularity theorems proven by Stephen Hawking and Roger Penrose, one of which is known as the classical Hawking-Penrose singularity theorem. It has general and physically reasonable conditions imposed on the spacetime and predicts different types of singularities, including "black hole" and "big bang" singularities. In this talk, we discuss the classical Hawking-Penrose singularity theorem.

Location

Seminar Room 1.33

Hanna Neumann Building 145 Science Road

Acton ACT 2601

-35.275387198178, 149.11925554276

Upcoming events in this series

MSI Graduate Student Colloquium Series
3 May 2024 | 3 - 4pm

Interested in meeting your fellow graduate students and learning about their research? We are restarting for 2024 the informal colloquium for graduate HDR students to share interesting topics they’ve come across during their studies.

View the event