Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A survey of repositories in graph theory   Since the pioneering work of R. M. Foster in the 1930s, many graph
repositories have been created to support research in graph theory. This survey
reviews many of these graph repositories and summarises the scope and contents
of each repository. We identify opportunities for the development of
repositories that can be queried in more flexible ways.

35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga