A note on extensions of algebraic and formal groups. IV: Kummer-Artin-Schreier-Witt theory of degree \(p^2\)

DOI10.2748/tmj/1178207479zbMath1073.14546OpenAlexW2080178569MaRDI QIDQ5949603

Tsutomu Sekiguchi, Noriyuki Suwa

Publication date: 2001

Published in: Tôhoku Mathematical Journal. Second Series (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2748/tmj/1178207479

Mathematics Subject Classification ID

Cohomology theory for linear algebraic groups (20G10) Formal groups, (p)-divisible groups (14L05)

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A universal Hochschild-Kostant-Rosenberg theorem, Models of group schemes of roots of unity, Artin-Schreier-Witt extensions and normal bases, Indecomposability and cyclicity in the p-primary part of the Brauer group of a p-adic curve, On the extensions of group schemes deforming G\(_a\) to G\(_m\), On the description of \(\mathbb Z/p^2\mathbb Z\)-torsors by the Kummer-Artin-Schreier-Witt theory, Problems from the Workshop on Automorphisms of Curves, Sekiguchi-Suwa theory revisited, Duality for Hopf orders, Cyclic extensions and the local lifting problem, Models of \(\mu _{p^{2},K}\) over a discrete valuation ring, On the extensions of \(\widehat{\mathcal G}^{(\lambda)}\) by \(\widehat{\mathbf G}_a\) over a \({\mathbb{Z}}_{(p)}\)-algebra., On the Cartier duality of certain finite group schemes of order \(p^n\), Convergence Polygons for Connections on Nonarchimedean Curves

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