Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combinatorial negative curvature and triangulations of three-manifolds   We introduce and study local combinatorial conditions on a simplicial
complex, implying Gromov hyperbolicity of its universal cover. We apply the
theory to Thurston's problem on 5/6*-triangulations of 3-manifolds, providing a
new proof and generalizing the original result. We indicate further
applications.

8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc