Tue, 17 Feb 2026
14:00
L6

TBC

Yotam Hendel
(Ben Gurion University of the Negev)
Abstract

to follow

Tue, 20 Jan 2026
13:00
L2

How to get an interacting conformal line defect for free theories

Christopher Herzog
(KCL )
Abstract
We argue that interacting conformal line defects in free quantum field theories can exist, provided that correlation functions are not invariant under inversion symmetry.  Important for our demonstration is the existence of a special cross ratio for bulk-defect-defect three point functions that is invariant under the conformal group but picks up a sign under inversion. We examine the particular case of a free scalar field in detail, and we provide a toy model example where this bulk field interacts via a Yukawa term with fermions on the line.  We expect nontrivial line defects may also exist for free Maxwell theory in four dimensions and free bulk fermions.  Based on 2510.02871.


 

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The David Blackwell Lecture

Michael I. Jordan (Inria Paris and the University of California, Berkeley) - A Collectivist, Economic Perspective on AI 

29 January, 3.30-4.30 pm, Large Lecture Theatre, Department of Statistics

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Work for Canada/USA Mathcamp

Canada/USA Mathcamp is looking for math graduate students as leaders for its summer 2026 session. 

When: June 23rd, 2026 to August 7th, 2026

Where: Champlain College, Burlington, Vermont

Compensation: $6,600 plus room, board, travel, and other work-related expenses

Application Deadline: February 11th, 2026

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The Ellis–Baldwin test
 Secrest, N Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 383 issue 2290 (13 Feb 2025)
Anisotropy in the cosmic acceleration inferred from supernovae
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Classification of finite depth objects in bicommutant categories via anchored planar algebras
 Henriques, A Penneys, D Tener, J Communications in Mathematical Physics
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