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Tag Archives: Dynamics
Orderability, and groups of homeomorphisms of the disk
I have struggled for a long time (and I continue to struggle) with the following question: Question: Is the group of selfhomeomorphisms of the unit disk (in the plane) that fix the boundary pointwise a leftorderable group? Recall that a … Continue reading
Posted in Dynamics, Groups
Tagged BurnsHale, distortion, Dynamics, orderable groups, quasimorphisms, Thurston stability theorem
4 Comments
Big mapping class groups and dynamics
Mapping class groups (also called modular groups) are of central importance in many fields of geometry. If is an oriented surface (i.e. a manifold), the group of orientationpreserving selfhomeomorphisms of is a topological group with the compactopen topology. The mapping … Continue reading
Amenability of Thompson’s group F?
Geometric group theory is not a coherent and unified field of enquiry so much as a collection of overlapping methods, examples, and contexts. The most important examples of groups are those that arise in nature: free groups and fundamental groups … Continue reading →