On large prime actions on Riemann surfaces

Abstract

In this article, we study compact Riemann surfaces of genus g with an automorphism of prime order g C 1. The main result provides a classification of such surfaces. In addition, we give a description of them as algebraic curves, determine and realise their full automorphism groups and compute their fields of moduli. We also study some aspects of their Jacobian varieties such as isogeny decompositions and complex multiplication. Finally, we determine the period matrix of the Accola–Maclachlan curve of genus four.