DOI QR코드

DOI QR Code

THE 𝑎-NUMBER FOR SUPERELLIPTIC CURVES OF GENUS

  • Gyoyong Sohn (Department of Mathematics Education, Daegu National University of Education)
  • Received : 2026.04.14
  • Accepted : 2026.05.29
  • Published : 2026.05.31

Abstract

This paper presents the 𝑎-number of superelliptic curves of genus 3 over a finite field using the action of the Cartier operator on H0 (C, Ω1 ). The 𝑎-number is an invariant of the p-torsion part of their Jacobians.

Keywords

References

  1. S. Frei. The a-number of hyperelliptic curves. Women in Number Theory II, (2018), 107-116, Springer Cham.
  2. Li, K.-Z and Oort, F. (1998). Moduli of supersingular abelian varieties, volume 1680 of Lecture Notes in Mathematics, Spinger-Verlag, Berlin.
  3. V. Nourozi and F. Rahmati, The rank of the cartier operator on Pi-card curves, Discrete Mathematics, Algorithms and Applications, 2450028, https://doi.org/10.1142/S1793830924500289.
  4. V. Nourozi, F. Rahmati, and S. Tafazolian, The a-number of certain hyperelliptic curves. Iranian Journal of Science and Technology, Transactions A: Science, 46(3), 621-628.
  5. Karl-Otto Stöhr and José Felipe Voloch, A formula for the Cartier operator on plane algebraic curves, J. Reine Angew. Math. 377 (1987), 49-64, Mr 887399. https://doi.org/10.1515/crll.1987.377.49
  6. A. Suterland, Counting points on superelliptic curves in average polynomial time, Fourteenth Algorithmic Number Theroy Symposium, The open book series 4, 2020.
  7. J. Tate, Residues of Differentials on Curves, Ann. Sci. École Norm. Sup. 4(1) (1968), 149-159. https://doi.org/10.24033/asens.1162
  8. A. Weil, Sur les courbes algébriques et les variétés qui s'en déduisent, Actualités Sci. Ind. (1948), no. 1041, Hermann et Cie.. Paris.
  9. A. Weil, Variétés abéliennes et courbes algébriques, Actualités Sci. Ind. (1948), no. 1064, Hermann & Cie., Paris.