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2001 A note on extensions of algebraic and formal groups, IV. Kummer-Artin-Schreier-Witt theory of degree $p^2$
Tsutomu Sekiguchi, Noriyuki Suwa
Tohoku Math. J. (2) 53(2): 203-240 (2001). DOI: 10.2748/tmj/1178207479

Abstract

We establish a formula for homomorphisms and extensions of group schemes and formal groups, related to deformations of the multiplicative group to the additive group. As an application, we give an explicit description of the theory unifying the Kummer and Artin-Schreier-Witt theories of degree $p^2$.

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Tsutomu Sekiguchi. Noriyuki Suwa. "A note on extensions of algebraic and formal groups, IV. Kummer-Artin-Schreier-Witt theory of degree $p^2$." Tohoku Math. J. (2) 53 (2) 203 - 240, 2001. https://doi.org/10.2748/tmj/1178207479

Information

Published: 2001
First available in Project Euclid: 3 May 2007

zbMATH: 1073.14546
MathSciNet: MR2002F:14059
Digital Object Identifier: 10.2748/tmj/1178207479

Subjects:
Primary: 14L05
Secondary: 13K05, 14L15, 20G10

Rights: Copyright © 2001 Tohoku University

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Vol.53 • No. 2 • 2001
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