Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On flow-equivalence of R-graph shifts   We show that Property $(A)$ of subshifts and the semigroup, that is
associated to subshifts with Property (A), are invariants of flow equivalence.
We show for certain $\mathcal R$-graphs that their isomorphism is implied by
the flow equivalence of their $\mathcal R$-graph shifts.

23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
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The categories of this paper are: atom-ph