Lagrangian Fibrations with designed singular fibres
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Abstract
We study Lagrangian Fibrations with designed singular fibers. The idea is to construct a K3 surface X as a minimal resolution of the singularities of a double cover Y of the plane branched along a reduced but possibly reducible singular sextic Σ. Moreover, we assume that Σ has at worst A-D-E singularities. This freeness of choosing Σ allows us to construct many examples of singular fibres with various singularities. We find an explicit description of the singular fibers of the Lagrangian Fibrations f : M_X(0,2H,χ) → |2H|. The results shed also some light on the correlation between the degree of the discriminant divisor ∆ and the topology of the corresponding moduli space.