Let R be a complete dvr with perfect residue field k of characteristic p > 0. Let {G(lambda))lambda is an element of R be the class of R-affine, commutative, smooth of relative dimension one group schemes generically isomorphic to G(m). Let G := {G(lambda,n))(lambda is an element of R,n is an element of N) be the class of finite flat commutative group schemes of order p(n) defined as kernels of the isogenies phi(lambda,n):G(lambda)-> G((lambda pn)). We provide an explicit description of torsors over R-schemes under the group schemes G(lambda) and G(lambda,n). (C) 2007 Elsevier Inc. All rights reserved.
Andreatta, F., Gasbarri, C. (2007). Torsors under some group schemes of order pn. JOURNAL OF ALGEBRA, 318(2), 1057-1067 [10.1016/j.jalgebra.2007.07.022].
Torsors under some group schemes of order pn
GASBARRI, CARLO
2007-01-01
Abstract
Let R be a complete dvr with perfect residue field k of characteristic p > 0. Let {G(lambda))lambda is an element of R be the class of R-affine, commutative, smooth of relative dimension one group schemes generically isomorphic to G(m). Let G := {G(lambda,n))(lambda is an element of R,n is an element of N) be the class of finite flat commutative group schemes of order p(n) defined as kernels of the isogenies phi(lambda,n):G(lambda)-> G((lambda pn)). We provide an explicit description of torsors over R-schemes under the group schemes G(lambda) and G(lambda,n). (C) 2007 Elsevier Inc. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.