Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3-bounded property in a triangle-free distance-regular graph   Let $\Gamma$ denote a distance-regular graph with classical parameters $(D,
b, \alpha, \beta)$ and $D\geq 3$. Assume the intersection numbers $a_1=0$ and
$a_2\not=0$. We show $\Gamma$ is 3-bounded in the sense of the article
[D-bounded distance-regular graphs, European Journal of Combinatorics(1997)18,
211-229].

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The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex