The pinching gap conjecture for minimal submanifolds in spheres

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Let MM be an nn-dimensional minimal submanifold in Sn+mS^{n+m}. Let λ2\lambda_2 denote the quantity used in the paper, and suppose that ∣∣σ∣∣2+λ2||\sigma||^2+\lambda_2 is constant. Pinching gap conjecture. If

∣∣σ∣∣2+λ2>n,||\sigma||^2+\lambda_2>n,

then there is a constant ε(n,m)>0\varepsilon(n,m)>0 such that

∣∣σ∣∣2+λ2>n+ε(n,m).||\sigma||^2+\lambda_2>n+\varepsilon(n,m).

This conjecture proposes a gap above the pinching value nn for the quantity ∣∣σ∣∣2+λ2||\sigma||^2+\lambda_2. The supplied text gives no resolution, so its status remains open.

References

Primary source

Zhiqin Lu, “Normal scalar curvature conjecture and its applications”, arXiv:0803.0502 (2011).

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