Submanifolds with the Harmonic Gauss Map in Lie Groups

Details Submanifolds with the Harmonic Gauss Map in Lie Groups Submanifolds with the Harmonic Gauss Map in Lie Groups

2008-03-14

arxiv.org/abs/0803.2221v1

Journal of Mathematical Physics, Analysis, Geometry, vol. 4 (2008), no. 2, p. 278-293 (As Ye. V. Petrov)

Mathematics

Differential Geometry

To appear in Journal of Mathematical Physics, Analysis, Geometry

Scientific paper

In this paper we find a criterion for the Gauss map of an immersed smooth submanifold in some Lie group with left invariant metric to be harmonic. Using the obtained expression we prove some necessary and sufficient conditions for the harmonicity of this map in the case of totally geodesic submanifolds in Lie groups admitting biinvariant metrics. We show that, depending on the structure of the tangent space of a submanifold, the Gauss map can be harmonic in all biinvariant metrics or non-harmonic in some metric. For 2-step nilpotent groups we prove that the Gauss map of a geodesic is harmonic if and only if it is constant.

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