Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Foata's Bijection for Tree-Like Structures   We present bijections enumerating (k,m)-trees, k-gon trees, edge labelled
(2,1)-trees, and other tree-like structures. Our constructions are based on
Foata's (1971) bijection for cycle-free functions, which is simplified here.

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The categories of this paper are: funct-an
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: eess
20
The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat