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The Mean Curvature of Special Lagrangian 3-folds in SU(3)-Structures with Torsion

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arxiv 1905.03713 v3 pith:4ZWTACW2 submitted 2019-05-09 math.DG

classification math.DG
keywords lagrangianspecialfoldscurvaturemeanstructurestorsionable
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We derive formulas for the mean curvature of special Lagrangian 3-folds in the general case where the ambient 6-manifold has intrinsic torsion. Consequently, we are able to characterize those SU(3)-structures for which every special Lagrangian 3-fold is a minimal submanifold. In the process, we obtain an obstruction to the local existence of special Lagrangian 3-folds.

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