School of Mathematics Colloquium

Galois closure of essentially finite morphisms

by Prof. Antei Marco (University of Lille, France)

Thursday, January 21, 2010 from to (Asia/Kolkata)
at Colaba Campus ( AG-69 )
Description
Let $X$  be a scheme over a field  $k$ amd 
$f:Y\to x$ 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).
Organised by Aravindakshan T