Local structure of principally polarized stable Lagrangian fibrations

Details Local structure of principally polarized stable Lagrangian fibrations Local structure of principally polarized stable Lagrangian fibrations

2010-07-13

arxiv.org/abs/1007.2043v1

Mathematics

Algebraic Geometry

Scientific paper

A holomorphic Lagrangian fibration is stable if the characteristic cycles of the singular fibers are of type $I_m, 1 \leq m <\infty,$ or $A_{\infty}$. We will give a complete description of the local structure of a stable Lagrangian fibration when it is principally polarized. In particular, we give an explicit form of the period map of such a fibration and conversely, for a period map of the described type, we construct a principally polarized stable Lagrangian fibration with the given period map. This enables us to give a number of examples exhibiting interesting behavior of the characteristic cycles.

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