## Geometry & Topology

### Convex projective structures on nonhyperbolic three-manifolds

#### Abstract

Y Benoist proved that if a closed three-manifold $M$ admits an indecomposable convex real projective structure, then $M$ is topologically the union along tori and Klein bottles of finitely many submanifolds each of which admits a complete finite volume hyperbolic structure on its interior. We describe some initial results in the direction of a potential converse to Benoist’s theorem. We show that a cusped hyperbolic three-manifold may, under certain assumptions, be deformed to convex projective structures with totally geodesic torus boundary. Such structures may be convexly glued together whenever the geometry at the boundary matches up. In particular, we prove that many doubles of cusped hyperbolic three-manifolds admit convex projective structures.

#### Article information

Source
Geom. Topol., Volume 22, Number 3 (2018), 1593-1646.

Dates
Revised: 21 August 2017
Accepted: 15 October 2017
First available in Project Euclid: 31 March 2018

https://projecteuclid.org/euclid.gt/1522461624

Digital Object Identifier
doi:10.2140/gt.2018.22.1593

Mathematical Reviews number (MathSciNet)
MR3780442

Zentralblatt MATH identifier
06864264

#### Citation

Ballas, Samuel A; Danciger, Jeffrey; Lee, Gye-Seon. Convex projective structures on nonhyperbolic three-manifolds. Geom. Topol. 22 (2018), no. 3, 1593--1646. doi:10.2140/gt.2018.22.1593. https://projecteuclid.org/euclid.gt/1522461624

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