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Ending Laminations and Cannon-Thurston Maps

Research paper by Mahan Mj

Indexed on: 25 Nov '13Published on: 25 Nov '13Published in: Mathematics - Geometric Topology



Abstract

In earlier work, we had shown that Cannon-Thurston maps exist for Kleinian surface groups. In this paper we prove that pre-images of points are precisely end-points of leaves of the ending lamination whenever the Cannon-Thurston map is not one-to-one. In particular, the Cannon-Thurston map is finite-to-one. This completes the proof of the conjectural picture of Cannon-Thurston maps for surface groups.