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2009 Bitwist 3–manifolds
James W Cannon, William J Floyd, Walter R Parry
Algebr. Geom. Topol. 9(1): 187-220 (2009). DOI: 10.2140/agt.2009.9.187


Our earlier twisted-face-pairing construction showed how to modify an arbitrary orientation-reversing face-pairing on a faceted 3–ball in a mechanical way so that the quotient is automatically a closed, orientable 3–manifold. The modifications were, in fact, parametrized by a finite set of positive integers, arbitrarily chosen, one integer for each edge class of the original face-pairing. This allowed us to find very simple face-pairing descriptions of many, though presumably not all, 3–manifolds.

Here we show how to modify the construction to allow negative parameters, as well as positive parameters, in the twisted-face-pairing construction. We call the modified construction the bitwist construction. We prove that all closed connected orientable 3–manifolds are bitwist manifolds. As with the twist construction, we analyze and describe the Heegaard splitting naturally associated with a bitwist description of a manifold.


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James W Cannon. William J Floyd. Walter R Parry. "Bitwist 3–manifolds." Algebr. Geom. Topol. 9 (1) 187 - 220, 2009.


Received: 13 June 2008; Revised: 13 January 2009; Accepted: 13 November 2008; Published: 2009
First available in Project Euclid: 20 December 2017

zbMATH: 1179.57030
MathSciNet: MR2482073
Digital Object Identifier: 10.2140/agt.2009.9.187

Primary: 57N10

Rights: Copyright © 2009 Mathematical Sciences Publishers


Vol.9 • No. 1 • 2009
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