Existence of immersed spheres minimizing curvature functionals in compact 3-manifolds

Details Existence of immersed spheres minimizing curvature functionals in compact 3-manifolds Existence of immersed spheres minimizing curvature functionals in compact 3-manifolds

2011-11-21

arxiv.org/abs/1111.4893v1

Mathematics

Differential Geometry

Scientific paper

We study curvature functionals for immersed 2-spheres in a compact, three-dimensional Riemannian manifold M. Under the assumption that the sectional curvature of M is strictly positive, we prove the existence of a smoothly immersed sphere minimizing the L^{2} integral of the second fundamental form. Assuming instead that the sectional curvature is less than or equal to 2, and that there exists a point in M with scalar curvature bigger than 6, we obtain a smooth 2-sphere minimizing the integral of 1/4|H|^{2} +1, where H is the mean curvature vector.

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