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On the Kaehler angles of submanifolds

Isabel M. C. Salavessa
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Abstract

We prove that under certain conditions on the mean curvature and on the Kaehler angles, a compact submanifold M of real dimension 2n, immersed into a Kaehler-Einstein manifold N of complex dimension 2n, must be either a complex or a Lagrangian submanifold of N, or have constant Kaehler angle, depending on n=1, n=2, or n \geq 3, and the sign of the scalar curvature of N. These results generalize to non-minimal submanifolds some known results for minimal submanifolds. Our main tool is a Bochner-type technique involving a formula on the Laplacian of a symmetric function on the Kaehler angles and the Weitzenboeck formula for the Kaehler form of N restricted to M.

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Isabel M. C. Salavessa. 2002-04-30. On the Kaehler angles of submanifolds. https://arxiv.org/abs/math/0204349

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