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Preprints, Working Papers, ... Year : 2017

On the linear bounds on genera of pointless hyperelliptic curves

Abstract

An irreducible smooth projective curve over $\mathbb{F}_q$ is called \textit{pointless} if it has no $\mathbb{F}_q$-rational points. In this paper we study the lower existence bound on the genus of such a curve over a fixed finite field $\mathbb{F}_q$. Using some explicit constructions of hyperelliptic curves, we establish two new bounds that depend linearly on the number $q$. In the case of odd characteristic this improves upon a result of R. Becker and D. Glass. We also provide a similar new bound when $q$ is even.
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hal-01494793 , version 1 (24-03-2017)

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Ivan Pogildiakov. On the linear bounds on genera of pointless hyperelliptic curves. 2017. ⟨hal-01494793⟩

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