Integral forms and torsors of inseparable forms of G_a

2021/05/13 by Igor Dolgachev, Dolgachev, Igor
Mathematics · #11E72 #14Jxx #14Lxx #Algebraic Geometry (math.AG) #FOS: Mathematics #Group Theory (math.GR) #math.AG #math.GR #msc:11E72 #msc:14Jxx #msc:14Lxx

paper · pdf · doi:10.48550/arxiv.2105.06425

34 pages

arxiv created 2021/05/14 · arxiv updated 2021/05/17

Abstract

After recalling some basic facts about F-wound commutative unipotent algebraic groups over an imperfect field F we study their regular integral models over Dedekind schemes of positive characteristic and compute the group of isomorphisms classes of torsors of one-dimensional groups.

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