Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eulerian digraphs and Dyck words, a bijection   The main goal of this work is to establish a bijection between Dyck words and
a family of Eulerian digraphs. We do so by providing two algorithms
implementing such bijection in both directions. The connection between Dyck
words and Eulerian digraphs exploits a novel combinatorial structure: a binary
matrix, we call Dyck matrix, representing the cycles of an Eulerian digraph.

13
The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph