$B$-structures on $G$-bundles and local triviality

$B$-structures on $G$-bundles and local triviality
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$G$ 束上的 $B$ 结构和局部琐碎性

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发表时间:
1995
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通讯作者:
C. Simpson
C. Simpson
中科院分区:
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文献类型:
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作者:
V. Drinfeld;C. Simpson

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1.设G是Z上的分裂约化群概型(回想一下,对于任何代数闭域k,在这样的群概型的同构类与k上连通约化代数群的同构类之间存在一个双射G → G k)。设B是G的Borel子群.设S是一个概型,X是S上的光滑真概型,其连通几何纤维为纯维1。我们的目标是证明以下定理。
1. Let G be a split reductive group scheme over Z (recall that for any algebraically closed field k there is a bijection G → G ⊗ k between isomorphism classes of such group schemes and isomorphism classes of connected reductive algebraic groups over k). Let B be a Borel subgroup of G. Let S be a scheme and X a smooth proper scheme over S with connected geometric fibers of pure dimension 1. Our goal is to prove the following theorems.