English

A generalization of Geroch's conjecture

Differential Geometry 2023-09-07 v2 Analysis of PDEs

Abstract

The Theorem of Bonnet--Myers implies that manifolds with topology Mn1×S1M^{n-1} \times \mathbb{S}^1 do not admit a metric of positive Ricci curvature, while the resolution of Geroch's conjecture implies that the torus Tn\mathbb{T}^n does not admit a metric of positive scalar curvature. In this work we introduce a new notion of curvature interpolating between Ricci and scalar curvature (so called mm-intermediate curvature), and use stable weighted slicings to show that for n7n \leq 7 the manifolds Nn=Mnm×TmN^n = M^{n-m} \times \mathbb{T}^m do not admit a metric of positive mm-intermediate curvature.

Keywords

Cite

@article{arxiv.2207.08617,
  title  = {A generalization of Geroch's conjecture},
  author = {Simon Brendle and Sven Hirsch and Florian Johne},
  journal= {arXiv preprint arXiv:2207.08617},
  year   = {2023}
}

Comments

final version; to appear in Comm. Pure. Appl. Math

R2 v1 2026-06-25T01:00:43.867Z