Stability of the Reeb vector field of H-contact manifolds |
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Authors: | Domenico Perrone |
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Affiliation: | (1) Dipartimento di Matematica “Ennio De Giorgi”, Università del Salento, 73100 Lecce, Italy |
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Abstract: | It is well known that a Hopf vector field on the unit sphere S 2n+1 is the Reeb vector field of a natural Sasakian structure on S 2n+1. A contact metric manifold whose Reeb vector field ξ is a harmonic vector field is called an H-contact manifold. Sasakian and K-contact manifolds, generalized (k, μ)-spaces and contact metric three-manifolds with ξ strongly normal, are H-contact manifolds. In this paper we study, in dimension three, the stability with respect to the energy of the Reeb vector field ξ for such special classes of H-contact manifolds (and with respect to the volume when ξ is also minimal) in terms of Webster scalar curvature. Finally, we extend for the Reeb vector field of a compact K-contact (2n+1)-manifold the obtained results for the Hopf vector fields to minimize the energy functional with mean curvature correction. Supported by funds of the University of Lecce and M.I.U.R.(PRIN). |
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Keywords: | Energy and volume Reeb vector fields Stability Webster scalar curvature H-contact three-manifolds K-contact manifolds |
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