Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Geodesic Spanners for Points in $\mathbb{R}^3$ amid Axis-parallel Boxes   Let $P$ be a set of $n$ points in $\mathbb{R}^3$ amid a bounded number of
obstacles. When obstacles are axis-parallel boxes, we prove that $P$ admits an
$8\sqrt{3}$-spanner with $O(n\log^3 n)$ edges with respect to the geodesic
distance.

18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th