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math.NT2011
Sekiguchi-Suwa theory revisited
Ariane Mézard, Matthieu Romagny, Dajano Tossici
We present an account of the construction by S. Sekiguchi and N. Suwa of a cyclic isogeny of affine smooth group schemes unifying the Kummer and Artin-Schreier-Witt isogenies. We c…
math.NT1998★ 2 cited
Computation of a universal deformation ring
Ariane Mezard
We compute the universal deformation ring of an odd Galois two dimensional representation of Gal with an upper triangular image, where is the maximal abelian pro--ext…