Bath Numerical Analysis Seminar

Fridays at 12.15 (online)

Everyone is welcome at these talks.

Date Speaker Title
2 Oct 2020 Pan Kessel (TU Berlin, Germany) Teams
Deep Generative Models in Lattice Field Theories

Recent work has taken promising first steps towards an application of deep generative models in lattice field theories. In these approaches, deep generative models are used to generate field configurations. These configurations can then be used to estimate physical observables. In this talk, I will give a (hopefully) pedagogical overview of the subject. In particular, I will outline how these methods can be used to estimate observables which cannot directly be measured by MCMC methods.

9 Oct 2020 Luca Zanetti (Bath) Teams
Spectral methods for graph clustering, old and new

Graph clustering is one of the fundamental problems of data science and network analysis. Informally, the aim of graph clustering is to partition a network into subsets (clusters) so that nodes belonging to the same cluster are better connected to one another than nodes belonging to different clusters. A popular approach to graph clustering is to use the eigenvectors of the graph Laplacian to embed the nodes of the network in Euclidean space, and then use a geometric clustering scheme, such as k-means, to partition these embedded nodes. This approach is called Spectral Clustering. In this talk I will survey my work on Spectral Clustering. In particular, I would like to highlight my contributions in bridging the gap between our theoretical and practical understanding of Spectral Clustering. Finally, I will introduce recent work aiming to generalise spectral techniques from undirected to directed networks.

16 Oct 2020 Yuji Nakatsukasa (Oxford) Teams


23 Oct 2020 Constantino Antonio García Martínez (University of Santiago de Compostela, Spain) Teams


30 Oct 2020 Christoph Brune (Twente, Netherlands) Teams


6 Nov 2020 Silvia Gazzola (Bath) Teams


13 Nov 2020 Andreas Langer (Stuttgart, Germany) Teams


20 Nov 2020 Olivier Fercoq (Télécom Paris, France) Teams


27 Nov 2020 Konrad Polthier (FU Berlin, Germany) Teams


4 Dec 2020 Tobias Weinzierl (Durham) Teams


11 Dec 2020




Seminar calendar

You can subscribe to the NA calendar directly from your calendar client, including Outlook, Apple’s iCalendar or Google calendar. The web address of the calendar is this ICS link which you will need to copy.

To subscribe to a calendar in Outlook:

  1. In Calendar view, select “Add Calendar” (large green +)
  2. Select “From Internet”
  3. Copy paste the ICS link, click OK, and click Yes to subscribe.

To subscribe to a calendar in iCalendar, please follow these instructions. Copy paste the ICS link in “web address”.

To subscribe to a calendar in Google Calendar:

  1. Go to link.
  2. On the left side go to "Other Calendars" and click on the dropdown.
  3. Choose "Add by URL".
  4. Copy paste the ICS link in the URL of the calendar.
  5. Click on "Add Calendar" and wait for Google to import your events. This creates a calendar with a somewhat unreadable name.
  6. To give a readable name to the calendar, click on the three vertical dots sign next to the newly created calendar and select Settings.
  7. Choose a name for the calendar, eg. Numerical Analysis @ Bath, and click back button on top left.

How to get to Bath See here for instructions how to get to Bath. Please email Matthias Ehrhardt ( if you intend to come by car and require a parking permit for Bath University Campus for the day.
Tips for giving talks

Tips for new students on giving talks

Since the audience of the NA seminar contains both PhD students and staff with quite wide interests and backgrounds, the following are some guidelines/hints to make sure people don't give you evil looks at lunch afterwards.

Before too much time passes in your talk, ideally the audience should know the answers to the following 4 questions:

  • What is the problem you're considering?
  • Why do you find this interesting?
  • What has been done before on this problem/what's the background?
  • What is your approach/what are you going to talk about?

There are lots of different ways to communicate this information. One way, if you're doing a slide show, could be for the first 4 slides to cover these 4 questions; although in this case you may want to revisit these points later on in the talk (e.g. to give more detail).


  • "vertebrate style" (structure hidden inside - like the skeleton of a vertebrate) = good for detective stories, bad for maths talks.
  • "crustacean style" (structure visible from outside - like the skeleton of a crustacean) = bad for detective stories, good for maths talks.