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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

CPT Student Seminar: Many Moonshines: Monstrous, Mathieu and (M)Umbral

Presented by Sam Fearn, Durham University

2 May 2016 17:10 in OC218

Mathieu Moonshine concerns a surprising observation relating string theory to the representation theory of a particular sporadic group, Mathieu 24. This is reminiscent of Monstrous Moonshine in which it was discovered that the coefficients of the modular j-function are related to the representation theory of the Monster group. In this talk we will introduce a topological invariant of string theories compactified on K3 surfaces, called the elliptic genus of K3, and see how Mathieu 24 appears in this context. To this date, the role of the large discrete symmetry M24 in String Theory is not properly understood. We will then discuss Umbral moonshine, which comprises of 23 examples of moonshine in which the Niemeier lattices are used to connect certain mock modular forms to finite groups.

A copy of the slides for this talk can be found at the above link.

Contact s.m.fearn@durham.ac.uk for more information

A gathering of mathematicians from the CPT group with physicists from IPPP, we meet to discuss our work in a relaxed and friendly environment.

An archive of previous years talks is kept here.