Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Embedding theorems for actions on generalized trees, I   Using suitable deformations of simplicial trees and the duality theory for
median sets, we show that every free action on a median set can be extended to
a free and transitive one. We also prove that the category of median groups is
a reflective full subcategory of the category of free actions on pointed median
sets.

33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat