Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bigraphical Arrangements   We define the bigraphical arrangement of a graph and show that the
Pak-Stanley labels of its regions are the parking functions of a closely
related graph, thus proving conjectures of Duval, Klivans, and Martin and of
Hopkins and Perkinson. A consequence is a new proof of a bijection between
labeled graphs and regions of the Shi arrangement first given by Stanley. We
also give bounds on the number of regions of a bigraphical arrangement.

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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol