Carə tuttə, Vi scrivo per annunciarvi: --- A summer school will take place in the university Paris Diderot, from June 13th to 17th 2022, on "Representation theory and flag or quiver varieties". It will focus on the following topics: -Quantum cohomology and K-theory, -Stable envelopes, -Quiver varieties, -Cluster algebras -… The school will consists of 4 courses given by L. Mihalcea, R. Rymanyi, A. Smirnov, C. Robles, T. Lam and A. Shapiro. After the school there will be a 3-days workshop, from June 20th to 22nd, with research talks on the same subjects. Some funding is available for the housing of participants. For more information see https://school2022.sciencesconf.org/ Registration is open and will be closed on March 15th, 2022. Organizers : N. Perrin (Université Paris-Saclay) O. Schiffmann (Université Paris-Saclay) E. Vasserot (Université de Paris) M. Varagnolo (Université Cergy-Paris) --- Vi prego di inoltrare questo annuncio a tuttə coloro che possano essere interessati. A presto, Francesco