The collapsing geometry of almost Ricci-flat 4-manifolds
Differential Geometry
2020-03-24 v4
Abstract
We consider Riemannian 4-manifolds that Gromov-Hausdorff converge to a lower dimensional limit space, with the Ricci tensor going to zero. Among other things, we show that if the limit space is two dimensional then under some mild assumptions, the limiting four dimensional geometry away from the curvature blowup region is semiflat Kaehler.
Keywords
Cite
@article{arxiv.1708.06780,
title = {The collapsing geometry of almost Ricci-flat 4-manifolds},
author = {John Lott},
journal= {arXiv preprint arXiv:1708.06780},
year = {2020}
}
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