Mon, 10 Mar 2025
13:00
L6

Higher-form Symmetries in Linear Gravity

Adam Kmec
Abstract

Recently, work has been done to understand higher-form symmetries in linear gravity. Just like Maxwell theory, which has both electric and magnetic U(1) higher form symmetries, linearised gravity exhibits analogous structure. The authors of
[https://arxiv.org/pdf/2409.00178] investigate electric and magnetic higher form symmetries in linearised gravity, which correspond to shift symmetries of the graviton and the dual graviton respectively. By attempting to gauge the two symmetries, the authors investigate the mixed ’t Hooft anomalies anomaly structure of linearised gravity. Furthermore, if a specific shift symmetry is considered, the corresponding charges are related to Roger Penrose's quasi-local charge construction.

Based on: [https://arxiv.org/pdf/2410.08720][https://arxiv.org/pdf/2409.00178][https://arxiv.org/pdf/2401.17361]

Defending against diverse attacks in federated learning through consensus-based bi-level optimization
García Trillos, N Kumar Akash, A Li, S Riedl, K Zhu, Y Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Thu, 13 Mar 2025
16:00
L6

Parametrising complete intersections

Jakub Wiaterek
(University of Oxford)
Abstract

For some values of degrees d=(d_1,...,d_c), we construct a compactification of a Hilbert scheme of complete intersections of type d. We present both a quotient and a direct construction. Then we work towards the construction of a quasiprojective coarse moduli space of smooth complete intersections via Geometric Invariant Theory.

Maths TshirtThe old stock Mathematical Institute merchandise is going on sale next Thursday, March 13th at 12 noon in the North Mezzanine.

A vacancy to join Maastricht University as part of the ERC STG project “AUTOMATHIC”. This 5-year interdisciplinary project aims to perform cutting-edge research in developing new methodologies for the automated modeling of the dynamic behavior of large biological networks. The project also involves engaging with national and international stakeholders.

 

MRI ScannerSpend your summer helping develop an ultra-low-cost MRI scanner. Based in Oxford, we’re building our first prototype to reduce scan costs by 100x, enabling earlier cancer detection.

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