Clifford-band width conjecture

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Let Mp,q=Sp×Sq×[−1,1]M_{p,q}=\mathbf S^p\times\mathbf S^q\times[-1,1] be a Clifford band, and let gg be a smooth metric on Mp,qM_{p,q}. Clifford-band width conjecture. If

sec⁡(g)≥1,\operatorname{sec}(g)\geq1,

then

width⁡(Mp,q,g)≤π2.\operatorname{width}(M_{p,q},g)\leq\frac{\pi}{2}.

This is a proposed higher-dimensional analogue of the positive-sectional-curvature width estimate for overtorical bands; the source gives no resolution of the conjecture.

References

Primary source

Jintian Zhu, “Width estimate and doubly warped product”, arXiv:2003.01315 (2020).

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