arXiv:math/0206020 Abstract

Published 2002-06-04, updated 2003-12-24Version 2

This paper has been withdrawn by the author. The main result is wrong, as M.Matignon and C. Lehr provided a counterexample to it.

Comments: This paper has been withdrawn

Categories: math.AG, math.AC

Subjects: 14H37, 14D15, 13D10

Keywords: large automorphism group, positive characteristic, main result, counterexample

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