%0 Journal Article %A Benjamin Antieau %A Ben Williams %T Topology and purity for torsors %J Documenta mathematica %D 2015 %P 333-355 %V 20 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/492/ %R 10.4171/dm/492 %F 10_4171_dm_492