2 citations · 5 across the 3 of their papers we have counts for
4 papers
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…
Relevements des revetements de courbes faiblement ramifies (Lifts of weakly ramified coverings of curves)
Gunther Cornelissen, Ariane Mezard
Let X be a smooth projective curve over a field of characteristic p>0 and G a finite group of automorphism of X. Let n(X,G) be the characteristic of the versal equivariant deformat…
Induction and restriction in formal deformation of coverings
Jose Bertin, Ariane Mezard
Let X/S be a semistable curve with an action of a finite group G and let H be a normal subgroup of G. We present a new condition under which for any base change T->S, (X/G)*T is is…
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…