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On the deformation of a Barsotti-Tate group over a curve
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classification
math.AG
keywords
curvedeformationgroupliftingalgebraicallyapplybarsotti-tatecase
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In this paper, we study deformations of pairs (C,G) where G is a height 2 BT(or BT_n) group over a complete curve on algebraically closed field k of characteristic p. We prove that, if the curve C is a versal deformation of G, then there exists a unique lifting of the pair to the Witt ring W. We apply this result in the case of Shimura curves to obtain a lifting criterion.
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