Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Class-closing factor codes and constant-class-to-one factor codes from
  shifts of finite type   We define class-closing factor codes from shifts of finite type and show that
they are continuing if their images are of finite type. We establish several
relations between class-closing factor codes, continuing factor codes and
constant-class-to-one factor codes. In particular it is shown that a factor
code between irreducible shifts of finite type is constant-class-to-one if and
only if it is bi-class-closing, generalizing a result of Nasu.

24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph