2001/11/09 by Dominic Joyce, Joyce, Dominic
Mathematics · #Algebraic Geometry (math.AG) #Differential Geometry (math.DG) #FOS: Mathematics #math.AG #math.DG
paper · pdf · doi:10.48550/arxiv.math/0111111
34 pages, LaTeX. (v3) Section 6 rewritten, and new references added
arxiv created 2003/09/29 · arxiv updated 2009/11/30
We introduce special Lagrangian submanifolds in Cm and in (almost) Calabi-Yau manifolds, and survey recent results on singularities of special Lagrangian submanifolds, and their application to the SYZ Conjecture. The paper is aimed at graduate students in Geometry, String Theorists, and others wishing to learn the subject. Special Lagrangian m-folds in Cm are defined, and ways of constructing them described. 'Almost Calabi-Yau manifolds' (a generalization of Calabi-Yau manifolds useful in special Lagrangian geometry) are introduced, and the deformation theory, obstruction theory, and moduli spaces of compact special Lagrangian m-folds in (almost) Calabi-Yau m-folds are explained. Then we consider singular special Lagrangian submanifolds which are locally modelled on special Lagrangian cones with an isolated singularity at 0. Compact singular special Lagrangian submanifolds of this type have a well-behaved deformation theory, and can often be realized as limits of families of compact, nonsingular special Lagrangian submanifolds. Applications of this to the SYZ Conjecture and Mirror Symmetry of Calabi-Yau 3-folds are discussed.