Hopf–Galois Extensions with Central Invariants and Their Geometric Properties
Hopf–Galois Extensions with Central Invariants and Their Geometric Properties
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具有中心不变量的 Hopf-Galois 扩展及其几何性质
DOI：
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发表时间：
1998
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通讯作者：
D. Rumynin
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作者：
D. Rumynin
We set up a general framework to study representation theory of certain algebras whichusually appear in the study of restricted Lie algebras or various quantum objects at roots of unity.The object of the study is a Hopf–Galois extension with central invariants. It turns out that theseextensions possess some geometric properties which are close to those of principal bundles andFrobenius manifolds. We define Hopf–Galois extensions of not necessarily affine schemes andprove that the classification problem of such extensions leads to a stack.
