IUMJ

Title: Dihedral coverings of trigonal curves

Authors: Alex Degtyarev

Issue: Volume 61 (2012), Issue 3, 901-938

Abstract:

We classify and study trigonal curves in Hirzebruch surfaces admitting dihedral Galois coverings. As a consequence, we obtain certain restrictions on the fundamental group of a plane curve $D$ with a singular point of multiplicity $(\deg D-3)$.