# School of Mathematics

## Topological filters: a toolbox for processing dynamic signals

## Toplogies of the zero sets of random real projective hyper-surfaces and of monochromatic waves.

## Friends Lunch with a Member

## Exceptional holonomy and related geometric structures: Dimension reduction and boundary value problems.

## Exceptional holonomy and related geometric structures: Examples and moduli theory.

We will discuss the constructions of compact manifolds with exceptional holonomy (in fact, holonomy $G_{2}$), due to Joyce and Kovalev. These both use “gluing constructions”. The first involves de-singularising quotient spaces and the second constructs a 7-manifold from “building blocks” derived from Fano threefolds. We will explain how the local moduli theory is determined by a period map and discuss connections between the global moduli problem and Riemannian convergence theory (for manifolds with bounded Ricci curvature).

## Exceptional holonomy and related geometric structures: Basic theory.

## On Expressiveness and Optimization in Deep Learning

## Summation formulae and speculations on period integrals attached to triples of automorphic representations

Braverman and Kazhdan have conjectured the existence of summation formulae that are essentially equivalent to the analytic continuation and functional equation of Langlands L-functions in great generality. Motivated by their conjectures and related conjectures of L. Lafforgue, Ngo, and Sakellaridis, Baiying Liu and I have proven a summation formula analogous to the Poisson summation formula for the subscheme cut out of three quadratic spaces $(V_i,Q_i)$ of even dimension by the equation

$Q_1(v_1)=Q_2(v_2)=Q_3(v_3)$.