# Non-Invertible Symmetries

- Institution: CERN
- Department: Theory Colloquia
- Speaker: Sakura Schafer-Nameki
- Year: 2023
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3020091)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Symmetries play a key role in almost any context in theoretical physics. In the past year a new type of symmetry was uncovered, so-called non-invertible symmetries. Unlike standard fare symmetries they do not obey group-multiplication, but generally do not have inverses. I will give examples of such symmetries and provide some applications to QFTs in various dimensions. .

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## Lectures

1. [Non-Invertible Symmetries](https://invisiblenetwork.ai/learn/cern/3020091/b33a755b4a12), 1 h 16 min (CERN's player)