English

A 3-Manifold with no Real Projective Structure

Geometric Topology 2015-01-06 v2 Differential Geometry

Abstract

We show that the connected sum of two copies of real projective 3-space does not admit a real projective structure. This is the first known example of a connected 3-manifold without a real projective structure.

Keywords

Cite

@article{arxiv.1207.2007,
  title  = {A 3-Manifold with no Real Projective Structure},
  author = {Daryl Cooper and William Goldman},
  journal= {arXiv preprint arXiv:1207.2007},
  year   = {2015}
}

Comments

Minor corrections suggested by referee

R2 v1 2026-06-21T21:32:40.826Z