Sergio Cabello: Packing d-dimensional balls into a (d+1)-dimensional container - Rényi Intézet, Tondós terem - - -
Jacob Fox (Stanford): Ramsey Cayley Graphs, Communication, and Additive Combinatorics Without Addition - Rényi, Nagyterem + Zoom - - -
Zalán Molnár: Variations on the ultrafilter extensions - the many different ways - ELTE BTK Room 224 + Zoom - - -