Galois subcovers of the Hermitian curve in characteristic $p$ with respect to subgroups of order $p^2$

Barbara Gatti, Gábor Korchmáros

A (projective, geometrically irreducible, non-singular) curve $\mathcal{X}$ defined over a finite field ${\mathbb{F}}_{q^2}$ is maximal if the number $N_{q^2}$ of its $\mathbb{F}_{q^…