Mon, 19 Oct 2026
16:30 -
17:30
L4
A structure theorem for properly embedded CMC surfaces and applications
Giuseppe Tinaglia
(Kings College London)
Abstract
I will discuss the geometry of genus zero CMC surfaces embedded in Euclidean space and, among other things, prove a local area estimate for such surfaces. This is joint work with Bill Meeks.
Thu, 05 Nov 2026
16:00 -
17:00
L5
Thu, 22 Oct 2026
16:00 -
17:00
L5
Universal approximation with signatures of non-geometric rough paths
Mihriban Ceylan
(Mannheim University)
Abstract
Recently, data-driven methods based on path signatures have gained prominence in mathematical finance. They rely on universal approximation theorems stating that continuous functionals on path space can be approximated uniformly on compact sets by linear functionals of the signature. In financial applications, this has led to the use of Stratonovich-signatures, although Itô integration is often the natural modeling framework.
In this talk, we establish a universality result for signatures of non-geometric rough paths. By augmenting the path with its rough path bracket, we obtain a quasi-shuffle structure that provides the algebraic basis for universality. For continuous semimartingales, this yields a universal approximation property for Itô signatures.
This talk is based on joint work with A. P. Kwossek and D. J. Prömel.
DYSANOS Generative Dynamic Smooth Arbitrage-free Non-parametric Option Surfaces
Buehler, H
Horvath, B
Kratsios, A
(12 Aug 2026)
A Reduction Over Finite Fields of the Tame Local Langlands Correspondence for SLN
Collacciani, E
International Mathematics Research Notices
volume 2025
issue 20
(22 Oct 2025)
The versatility of the Drinfeld double of a finite group
Carnovale, G
Ciccoli, N
Collacciani, E
Indagationes Mathematicae
volume 36
issue 6
1600-1627
(Nov 2025)
Mon, 07 Jun 2027
14:00 -
15:00
Lecture Room 3
To be announced
Professor Julie Delon
(École Normale Supérieure - PSL - Université Paris Cité)
Abstract
TBA