This article is cited in 1 paper

Submanifolds with the harmonic Gauss map in Lie groups

Ye. V. Petrov

Department of Mechanics and Mathematics, V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61077, Ukraine

Abstract: 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 nonharmonic 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.

Key words and phrases: left invariant metric, biinvariant metric, Gauss map, harmonic map, 2-step nilpotent group, totally geodesic submanifold.

MSC: Primary 53C42; Secondary 53C43, 22E25, 22E46

Received: 07.03.2007

Language: English

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