Mittagsseminar: Prof. Dr. Ambrus Pál (Imperial College London): A semistable Lefschetz (1,1)-theorem in equicharacteristic

am Mittwoch, 16.05.2018 10:00 im Raum N1
Mathematik und Informatik

Abstract: First I will talk about my joint work with Chris Lazda on how to use some elementary properties of the logarithmic de Rham-Witt complex to prove that a rational line bundle on the special fibre of a proper, semistable scheme over a power series ring k[[t]] in characteristic p lifts to the total space if and only if its first Chern class does. This generalises a result of Morrow in the smooth case, and provides an equicharacteristic analogue of a result of Yamashita. I will also explain an application to the Tate conjecture for certain Drinfeld-Stuhler modular varieties; the latter is joint work in progress with J

Angelegt am Mittwoch, 09.05.2018 14:30 von harenbrh
Geändert am Mittwoch, 09.05.2018 14:30 von harenbrh
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