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Appendix to a paper of Maisner and Nart

Everett W. Howe

Published 2001-11-01Version 1

We prove that there is no genus-2 curve over F_q whose Jacobian has characteristic polynomial of Frobenius equal to x^4 + (1 - 2q) x^2 + q^2. Maisner and Nart had observed (by direct computation) that this was true for all q less than 65.

Comments: 2 pages, Latex. To appear in Experiment. Math
Journal: Experiment. Math. 11 (2002) 321--337.
Categories: math.NT, math.AG
Subjects: 11G20, 14G15, 11G10, 14H25
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