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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(online) ISSN 0002-9939(print)


On genus change in algebraic curves over imperfect fields

Author: Stefan Schröer
Journal: Proc. Amer. Math. Soc. 137 (2009), 1239-1243
MSC (2000): Primary 14H20
Published electronically: October 9, 2008
MathSciNet review: 2465645
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Abstract: We give a new proof, in scheme-theoretic language, of Tate's classical result on genus change of curves over imperfect fields in characteristic $ p>0$. Namely, for normal geometrically integral curves, the difference between arithmetic and geometric genus over the algebraic closure is divisible by $ (p-1)/2$.

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Additional Information

Stefan Schröer
Affiliation: Mathematisches Institut, Heinrich-Heine-Universität, 40225 Düsseldorf, Germany

PII: S 0002-9939(08)09712-8
Received by editor(s): April 11, 2007
Received by editor(s) in revised form: April 17, 2008
Published electronically: October 9, 2008
Communicated by: Ted Chinburg
Article copyright: © Copyright 2008 American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication.

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