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On a Galois cover of the Hermitian curve of genus $\mathfrak{g}=\frac{1}{8}(q-1)^2$ (2410.22037v1)

Published 29 Oct 2024 in math.AG

Abstract: In the study of algebraic curves with many points over a finite field, a well known general problem is to understanding better the properties of $\mathbb{F}{q2}$-maximal curves whose genera fall in the higher part of the spectrum of the genera of all $\mathbb{F}{q2}$-maximal curves. This problem is still open for genera smaller than $ \lfloor \frac{1}{6}(q2-q+4) \rfloor$. In this paper we consider the case of $\mathfrak{g}=\frac{1}{8}(q-1)2$ where $q\equiv 1\pmod{4}$ and the curve is the Galois cover of the Hermitian curve w.r.t to a cyclic automorphism group of order $4$. Our contributions concern Frobenius embedding, Weierstrass semigroups and automorphism groups.

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