Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Shears for quasisymmetric maps   We give an elementary proof of a theorem that characterizes quasisymmetric
maps of the unit circle in terms of shear coordinates on the Farey tesselation.
The proof only uses the normal family argument for quasisymmetric maps and some
elementary hyperbolic geometry.

19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph