Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Piercing Numbers in Approval Voting   We survey a host of results from discrete geometry that have bearing on the
analysis of geometric models of approval voting. Such models view the political
spectrum as a geometric space, with geometric constraints on voter preferences.
Results on piercing numbers then have a natural interpretation in voting
theory, and we survey their implications for various classes of geometric
constraints on voter approval sets.

36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph