English

Preserving positive intermediate curvature

Differential Geometry 2023-11-03 v2

Abstract

Consider a compact manifold NN (with or without boundary) of dimension nn. Positive mm-intermediate curvature interpolates between positive Ricci curvature (m=1m = 1) and positive scalar curvature (m=n1m = n-1), and it is obstructed on partial tori Nn=Mnm×TmN^n = M^{n-m} \times \mathbb{T}^m. Given Riemannian metrics g,gˉg, \bar{g} on (N,N)(N, \partial N) with positive mm-intermediate curvature and mm-positive difference hghgˉh_g - h_{\bar{g}} of second fundamental forms we show that there exists a smooth family of Riemannian metrics with positive mm-intermediate curvature interpolating between gg and gˉ\bar{g}. Moreover, we apply this result to prove a non-existence result for partial torical bands with positive mm-intermediate curvature and strictly mm-convex boundaries.

Keywords

Cite

@article{arxiv.2301.07655,
  title  = {Preserving positive intermediate curvature},
  author = {Tsz-Kiu Aaron Chow and Florian Johne and Jingbo Wan},
  journal= {arXiv preprint arXiv:2301.07655},
  year   = {2023}
}

Comments

final version; the article is published in the Journal of Geometric Analysis

R2 v1 2026-06-28T08:14:42.196Z