In their proof of the Ending Lamination Conjecture, Brock, Canary, and Minsky prove existence of bilipschitz models of hyperbolic 3-manifolds (homeomorphic to a surface times $\mathbb{R}$) depending only on the topology and ending invariants of the manifold.

(See The classification of Kleinian surface groups, II: The Ending Lamination Conjecture and The classification of Kleinian surface groups. I. Models and bounds)

Their proof is non-constructive, so the bilipschitz constants cannot be computed from their proof.
Are the bilipschitz constants close to being computable from their proof? In other words is it "easy" to see what steps in their proof are non-constructive and whether these steps can be made effective?


See Bowditch: link text Systems of bands in hyperbolic 3-manifolds

with an approach to the Brock-Canary-Minsky Theorem (though not through their model manifold) that is, in principle, effective. Though I am not aware of an explicit algorithmic realization.

  • 3
    $\begingroup$ I don't know bb's identity, but it's certainly conceivable that he already knows that paper very well... $\endgroup$ – HJRW Oct 29 '12 at 10:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.