Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Maximal distance spectral radius of 4-chromatic planar graphs   We show that the kite graph $K_4^{(n)}$ uniquely maximizes the distance
spectral radius among all connected $4$-chromatic planar graphs on $n$
vertices.

3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph