Bandwidth and focal radius with positive isotropic curvature
classification
🧮 math.DG
math.GT
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manifoldsbandwidthboundarycurvaturefocalisotropicpositiveradius
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This paper investigates quantitative metric inequalities for manifolds with positive isotropic curvature (PIC). Our results include upper bounds on the bandwidth and focal radius of hypersurfaces in PIC manifolds, contingent on boundary convexities and Betti numbers. The proof is based on exploiting the spectral properties of a twisted de Rham-Hodge operator on manifolds with boundary.
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Cited by 1 Pith paper
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Sharp focal radius estimate and rigidity of hypersurfaces in manifolds with positive curvature
Proves sharp focal radius bound r_f ≤ π/4 for hypersurfaces with b_p(Σ) ≠ 0 under p-form curvature conditions, with Clifford rigidity in equality cases.
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