Calibrated associative and Cayley embeddings

Details Calibrated associative and Cayley embeddings Calibrated associative and Cayley embeddings

2007-08-09

arxiv.org/abs/0708.1286v2

Mathematics

Differential Geometry

Scientific paper

Using the Cartan-Kahler theory, and results on real algebraic structures, we prove two embedding theorems. First, the interior of a smooth, compact 3-manifold may be isometrically embedded into a G_2-manifold as an associative submanifold. Second, the interior of a smooth, compact 4-manifold K, whose double has a trivial bundle of self-dual 2-forms, may be isometrically embedded into a Spin(7)-manifold as a Cayley submanifold. Along the way, we also show that Bochner's Theorem on real analytic approximation of smooth differential forms, can be obtained using real algebraic tools developed by Akbulut and King.

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