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math.AG2017
A Tannakian classification of torsors on the projective line
Johannes Anschütz
In this small note we present a Tannakian proof of the theorem of Grothendieck-Harder on the classification of torsors under a reductive group on the projective line over a field.
math.NT2017
Reductive group schemes over the Fargues-Fontaine curve
Johannes Anschütz
For an arbitrary non-archimedean local field we classify reductive group schemes over the corresponding Fargues-Fontaine curve by group schemes over the category of isocrystals. We…