From real affine geometry to complex geometry

Details From real affine geometry to complex geometry From real affine geometry to complex geometry

2007-03-28

arxiv.org/abs/math/0703822v2

Mathematics

Algebraic Geometry

v2: improved hypothesis, 128 pages, submitted version

Scientific paper

We construct from a real affine manifold with singularities (a tropical manifold) a degeneration of Calabi-Yau manifolds. This solves a fundamental problem in mirror symmetry. Furthermore, a striking feature of our approach is that it yields an explicit and canonical order-by-order description of the degeneration via families of tropical trees. This gives complete control of the B-model side of mirror symmetry in terms of tropical geometry. For example, we expect our deformation parameter is a canonical coordinate, and expect period calculations to be expressible in terms of tropical curves. We anticipate this will lead to a proof of mirror symmetry via tropical methods. This paper is the key step of the program we initiated in math.AG/0309070.

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