Displaying similar documents to “Deformations and derived categories”

Formal deformation of curves with group scheme action

Stefan Wewers (2005)

Annales de l’institut Fourier

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We study equivariant deformations of singular curves with an action of a finite flat group scheme, using a simplified version of Illusie's equivariant cotangent complex. We apply these methods in a special case which is relevant for the study of the stable reduction of three point covers.