The local organizers warmly thank Claire Amiot (IUF), Delphine Moussard (ANR SyTriq), Gwénaël Massuyeau (ANR AlMaRé), Vincent Colin and Klaus Niederkrüger (ANR COZY), Emmanuel Wagner and Antoine Touzé (RTop thematic network), and all the organizations below. Their support was essential for this summer school to take place.