A bound on the genus of a curve with Cartier operator of small rank

Author:

Zhou ZijianORCID

Abstract

Abstract Ekedahl showed that the genus of a curve in characteristic $$p>0$$ p > 0 with zero Cartier operator is bounded by $$p(p-1)/2$$ p ( p - 1 ) / 2 . We show the bound $$p+p(p-1)/2$$ p + p ( p - 1 ) / 2 in case the rank of the Cartier operator is 1, improving a result of Re.

Funder

Chinese Government Scholarship

Publisher

Springer Science and Business Media LLC

Subject

General Mathematics

Reference7 articles.

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2. Re, R.: The rank of the Cartier operator and linear systems on curves. J. Algebra 236, 80–92 (2001)

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4. Frei, S.: The a-number of hyperelliptic curves. In: Bouw, I., Ozman, E., Johnson-Leung, J., Newton, R. (eds.) Women in Numbers Europe II. Association for Women in Mathematics Series, vol. 11, pp. 107–116. Springer, Cham (2018)

5. Matthew, H.: Baker: Cartier points on curves. Int. Math. Res. Not. 7, 353–370 (2000)

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