Seshadri constants in positive characteristic
Mircea Mustata (Michigan)
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When 
Mar 06, 2014 from 02:15 pm to 03:15 pm 
Where  Mainz, 05432 (Hilbertraum) 
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Abstract Seshadri constants measure the local positivity of an ample line bundle at a point. In characteristic 0, vanishing theorems imply that lower bounds on the Seshadri constants of a line bundle have nice consequences for the corresponding adjoint line bundle. I will explain how similar results can be proved in positive characteristic by making use of the Frobenius morphism. This is based on joint work with Karl Schwede.