English

Sharp Bertini theorem for plane curves over finite fields

Algebraic Geometry 2019-08-15 v1

Abstract

We prove that if CC is a reflexive smooth plane curve of degree dd defined over a finite field Fq\mathbb{F}_q with dq+1d\leq q+1, then there is an Fq\mathbb{F}_q-line LL that intersects CC transversely. We also prove the same result for non-reflexive curves of degree p+1p+1 and 2p+12p+1 where q=prq=p^{r}.

Keywords

Cite

@article{arxiv.1804.01569,
  title  = {Sharp Bertini theorem for plane curves over finite fields},
  author = {Shamil Asgarli},
  journal= {arXiv preprint arXiv:1804.01569},
  year   = {2019}
}

Comments

7 pages

R2 v1 2026-06-23T01:14:08.528Z