Around Sziklai's conjecture on the number of points of a plane curve over a finite field

  • Authors:
  • Masaaki Homma;Seon Jeong Kim

  • Affiliations:
  • Department of Mathematics, Kanagawa University, Yokohama 221-8686, Japan;Department of Mathematics and RINS, Gyeongsang National University, Jinju 660-701, Republic of Korea

  • Venue:
  • Finite Fields and Their Applications
  • Year:
  • 2009

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Abstract

This paper has double purposes. One of them is to give a new bound on the number of points of a plane curve of degree d over a finite field that meets Sziklai's conjectural bound at d=q+1. An example shows that this bound is sharp for d=q+1. The second one is to study an example against that conjecture for q=d=4. This curve also shows the sharpness of our bound.