Riemannian Hilbert submanifolds of nonpositive extrinsic curvature
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Abstract
We consider strongly parabolic, Hilbert submanifolds in Riemannian Hilbert manifolds. We prove that their properties are analogous to the known properties in the finite-dimensional case. The main geometric result consists of Theorem 3: a complete, Riemannian, Hilbert submanifold of nonpositive extrinsic curvature and finite codimension in a Hilbert sphere is a great sphere.
Keywords
Manifold Extrinsic Curvature Geometric Result Finite Codimension Great Sphere
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© Plenum Publishing Corporation 1991