Conformal welding of rectifiable curves.
Non-rectifiable limit sets of dimension one.
We construct quasiconformal deformations of convergence type Fuchsian groups such that the resulting limit set is a Jordan curve of Hausdorff dimension 1, but having tangents almost nowhere. It is known that no divergence type group has such a deformation. The main tools in this construction are (1) a characterization of tangent points in terms of Peter Jones' beta's, (2) a result of Stephen Semmes that gives a Carleson type condition on a Beltrami coefficient which implies rectifiability and (3)...
Quasiconformal mappings of Y-pieces.
In this paper we construct quasiconformal mappings between Y-pieces so that the corresponding Beltrami coefficient has exponential decay away from the boundary. These maps are used in a companion paper to construct quasiFuchsian groups whose limit sets are non-rectifiable curves of dimension 1.
An indestructible Blaschke product in the little Bloch space.
The little Bloch space, B, is the space of all holomorphic functions f on the unit disk such that lim lf'(z)l (1- lzl) = 0. Finite Blaschke products are clearly in B, but examples of infinite products in B are more difficult to obtain (there are now several constructions due to Sarason, Stephenson and the author, among others). Stephenson has asked whether B contains an infinite, indestructible Blaschke product, i.e., a Blaschke product B so that (B(z) - a)/(1 - âB(z)), is also a Blaschke product...
-stable Fuchsian groups.
Some homeomorphisms of the sphere conformal off a curve.
On a theorem of Beardon and Maskit.
Quasiconformal mappings which increase dimension.
BiLipschitz approximations of quasiconformal maps.
Locally minimal sets for conformal dimension.
On conformal dilatation in space.
Page 1