Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbifolds from a metric viewpoint   We characterize Riemannian orbifolds and their coverings in terms of metric
geometry. In particular, we show that the metric double of a Riemannian
orbifold along the closure of its codimension one stratum is a Riemannian
orbifold and that the natural projection is an orbifold covering.

18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg