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Rational double points on supersingular surfaces
Authors:Ichiro Shimada
Institution:Department of Mathematics, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
Abstract:We investigate configurations of rational double points with the total Milnor number $21$ on supersingular $K3$ surfaces. The complete list of possible configurations is given. As an application, we also give the complete list of extremal (quasi-)elliptic fibrations on supersingular $K3$ surfaces.

Keywords:Rational double point  supersingular $K3$ surface  extremal \mbox{(quasi-)} elliptic fibration
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