Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden Markov processes in the context of symbolic dynamics   In an effort to aid communication among different fields and perhaps
facilitate progress on problems common to all of them, this article discusses
hidden Markov processes from several viewpoints, especially that of symbolic
dynamics, where they are known as sofic measures, or continuous shift-commuting
images of Markov measures. It provides background, describes known tools and
methods, surveys some of the literature, and proposes several open problems.

1
The categories of this paper are: cs
3
The categories of this paper are: physics
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph