Salve,

ricevo ed inoltro p.c..

Cordialmente,

m.gianfelice

---------- Forwarded message ---------- Date: Thu, 7 Oct 2021 19:16:53 +0200 From: One World Probability ow.probability@gmail.com To: owps@lists.bath.ac.uk Subject: [owps] OWPS, October 21st: B. Derrida and Z. Shi on "Renormalisation and disorder: a simple toy-model"

Dear probabilists,

We wish to thank you for participating in this OWPS session. The next session will be two weeks from now, on October 21sh, from 14:00 to 15:45 UTC.

Bernard Derrida and Zhan Shi will talk about a simple toy-model for renormalization and disorder. Titles, abstracts and the Zoom link are below the signature, and can be found on the website https://www.owprobability.org/one-world-probability-seminar.

Please feel free to circulate this email, the information for getting on the mailing list can be found there https://www.owprobability.org/mailing-list.

Probabilistically yours, Bastien Mallein and Sébastien Martinea

--------- Renormalisation and disorder: a simple toy model (I) Bernard Derrida (Collège de France) LPSM is inviting you to a scheduled Zoom meeting.

Topic: OWPS Seminar October 21st Bernard Derrida & Zhan Shi Time: Oct 21, 2021 03:45 PM Paris Renormalisation and disorder: a simple toy model (II) Zhan Shi (AMSS, Chinese Academy of Sciences)

After a short review of our understanding of how a weak disorder or a low density of impurities affect the universality class of a phase transition, we will discuss a simple tree-like toy model for which one can prove that, due to disorder, the depinning transition becomes an infinite order transition of the Berezinski-Kosterlitz-Thouless type. This toy model was introduced to understand the depinning transition of a line from a random substrate, one of the simplest problems in the theory of disordered systems.   This depinning transition has a long history among physicists and mathematicians. Still the nature of the transition, one of the central questions of the problem, remains unsolved. Joint work with Xinxing Chen, Victor Dagard, Yueyun Hu and Mikhail Lifshits.

Zoom-link: https://us02web.zoom.us/j/87978274605?pwd=NXFkc1JyTTNOWjJ2U1ZNYVBEMG16UT09 Meeting ID: 879 7827 4605 Passcode: 771185

If you are having trouble with zoom, or if the capacity of the zoom room gets exceeded, you can also access to the Youtube live stream at the channel of the seminar: https://www.youtube.com/channel/UCiLiEQGTp6bZEhuHDM-WNWQ