
Let \(M^m\) be a compact Riemannian manifold immersed in Euclidean space \(\mathbb R^{m+k}\). The main result of the paper is that there are no stable currents in \(M^m\) if one of the following pinching conditions holds: 1) The sectional curvature \(K\) satisfies \(K > (k/4)(\lambda_0 - \mu_0)^2\) where \(\lambda_0\) and \(\mu_0\) are the maximum and the minimum of the principal curvatures. 2) \(\lambda\mu > (1/4) (\lambda-\mu)^2\) where \(\lambda\) and \(\mu\) are any two principal curvatures. The author also recognizes \(M^m\) as sphere if a pinching condition in terms of the principal curvatures is satisfied and shows that the nonexistence of stable currents can be extended to suitable compact submanifolds of \(M^m\).
49Q15, stable currents, sectional curvature, Global submanifolds, Geometric measure and integration theory, integral and normal currents in optimization, 53C40, 53C65, pinching, Global Riemannian geometry, including pinching, submanifolds, shape operator, submanifold, Integral geometry, Stable current
49Q15, stable currents, sectional curvature, Global submanifolds, Geometric measure and integration theory, integral and normal currents in optimization, 53C40, 53C65, pinching, Global Riemannian geometry, including pinching, submanifolds, shape operator, submanifold, Integral geometry, Stable current
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