Specialisation map for quiver Grassmannians

I will present a new development of a project in collaboration with Francesco Esposito, Ghislain Fourier and Fang Xin whose aim is to define and study a specialization map for quiver Grassmannians of Dynkin type. The project started in 2018. A first draft of the result obtained was put on the arXiv in 2022. This year we found a much better approach that I will explain in the seminar. We prove that the specialization map is surjective in type A. This generalizes a beautiful theorem of Lanini and Strickland concerning the cohomology of degenerate flag varieties. arXiv: 2206.10281.

https://sites.google.com/view/tgmrt-verona/program