Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-overlapping Dyck matrices   We define a set of binary matrices where any two of them can not be placed
one on the other in a way such that the corresponding entries coincide. The
rows of the matrices are obtained by means of Dyck words. The cardinality of
the set of such matrices involves Catalan numbers.

10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas