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Showing 2007 · math.AGShow all
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math.AG2007★ 1 cited
Descent constructions for central extensions of infinite dimensional Lie algebras
Arturo Pianzola, Daniel Prelat, Jie Sun
We use Galois descent to construct central extensions of twisted forms of split simple Lie algebras over rings. These types of algebras arise naturally in the construction of Exten…
math.AG2007
Reduction of structure for torsors over semilocal rings
V. Chernousov, Ph. Gille, Z. Reichstein
Let G be a reductive affine group scheme defined over a semilocal ring k. Assume that either G is semisimple or k is normal and noetherian. We show that G has a finite k-subgroup S…