![Coarse embeddings and group actions preserving rigid geometric structures](/media/cache/video_light/uploads/video/Capture%20d%E2%80%99%C3%A9cran%202024-06-17%20%C3%A0%2011.47.28.png)
![](/assets/front/img/icon-video-play-7e3956a0b9.png)
Coarse embeddings and group actions preserving rigid geometric structures
By Charles Frances
![Quantum Exclusion Process, Random Matrices and Free Cumulants](/media/cache/video_light/uploads/video/video-ddc53f277345198787a0aed538ba5fe0.jpg)
![](/assets/front/img/icon-video-play-7e3956a0b9.png)
Quantum Exclusion Process, Random Matrices and Free Cumulants
By Philippe Biane
Appears in collection : Research School in Discrete Mathematics and Computer Science / École de recherche en mathématiques discrètes et informatique - WEEK 1
The recent discovery of the “hat”, an aperiodic monotile points to the complexity that can be encoded within even a simple shape – might it even be undecidable whether or not a given shape can be used to form a tiling of the plane? We'll survey related this and related questions for tiles and subshifts of finite type in the plane and other geometric spaces.