Quasi-Galois points, II: Arrangements

Abstract

In Part I, the present authors introduced the notion of a quasi-Galois point, for investigating the automorphism groups of plane curves. In this second part, the number of quasi-Galois points for smooth plane curves is described. In particular, sextic or quartic curves with many quasi-Galois points are characterized.

36 pages. We extracted the results on the number of quasi-Galois points from arXiv:1505.00148, and extended them. arXiv admin note: text overlap with arXiv:1505.00148