Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ljusternik-Schnirelmann Categories, Links and Relations   This paper is concerned with some well-known Ljusternik-Schnirelmann
categories. We desire to find some links and relations among them. This has
been done by using the concepts of precategoty, T-collection and closure of a
category.

16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom