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Families of Galois closure curves for plane quartic curves. (English) Zbl 1063.14035

Summary: For a smooth quartic plane curve \(C\) we show an existence of a family of Galois closure curves \(\varphi:S\to C\), where \(S\) is a nonsingular projective surface and \(\varphi^{-1}(P)\) is isomorphic to the Galois closure curve \(C_P\) for a general point \(P\in C\). Moreover we determine the types of singular fibers. As a corollary we can say that \(C_p\) is not isomorphic to \(C_Q\) if \(P\) is close to \(Q\).

MSC:

14H30 Coverings of curves, fundamental group
14H50 Plane and space curves
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