Marco Antei
University of Lille, France
January 21, 2010
Galois closure of essentially finite morphisms: Let $X$ be a scheme over a field $k$ and $f:Y\to X$ an essentially finite morphism. We construct a "Galois closure" of $f$, i.e. the smallest possible torsor dominating it. As an application we construct the Galois closure of towers of torsors. (Work in collaboration with Michel Emsalem).
University of Lille, France
January 21, 2010
Galois closure of essentially finite morphisms: Let $X$ be a scheme over a field $k$ and $f:Y\to X$ an essentially finite morphism. We construct a "Galois closure" of $f$, i.e. the smallest possible torsor dominating it. As an application we construct the Galois closure of towers of torsors. (Work in collaboration with Michel Emsalem).