arXiv subjects

Alessandra Rigato

Publications and source records attributed to Alessandra Rigato.

2 recordsLinked to original sources

arXiv2010

Uniqueness of low genus optimal curves over F_2

A projective, smooth, absolutely irreducible algebraic curve X of genus g defined over a finite field F_q is called optimal if for every other such genus g curve Y over F_q one has $\#Y(F_q)\le \#X(F_q)$. In this paper we show that for $g\le 5$ there is a unique optimal genus g curve over F_2. For g=6 there are precisely two and for g=7 there are at least two.

math.NT↗

arXiv2010

The maximum number of rational points for a genus 4 curve over F_7 is 24

In this paper we show that the maximum number of rational points possible for a smooth, projective, absolutely irreducible genus 4 curve over a finite field F_7 is 24. It is known that a genus 4 curve over F_7 can have at most 25 points. In this paper we prove that such a curve can have at most 24. On the other hand we provide an explicit example of a genus 4 curve over F_7 having 24 points.

math.NT↗