Plane sextics with a type e8 singular point

Date
2010
Authors
Degtyarev, A.
Advisor
Instructor
Source Title
Tohoku Mathematical Journal
Print ISSN
0040-8735
Electronic ISSN
2186-585X
Publisher
Tohoku Daigaku Suugaku Kyoshitsu
Volume
62
Issue
Pages
329 - 355
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We construct explicit geometric models for and compute the fundamental groups of all plane sextics with simple singularities only and with at least one type E8 singular point. In particular, we discover four new sextics with nonabelian fundamental groups; two of them are irreducible. The groups of the two irreducible sextics found are finite. The principal tool used is the reduction to trigonal curves and Grothendieck’s dessins d’enfants.

Course
Other identifiers
Book Title
Keywords
Plane sextic, Singular curve, Fundamental group, Trigonal curve, Dessin d’enfant
Citation
Published Version (Please cite this version)