Browsing by Subject "Singular curve"
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Item Open Access Plane sextics with a type e8 singular point(Tohoku Daigaku Suugaku Kyoshitsu, 2010) Degtyarev, A.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.