Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterization of the allowed patterns of signed shifts   The allowed patterns of a map are those permutations in the same relative
order as the initial segments of orbits realized by the map. In this paper, we
characterize and provide enumerative bounds for the allowed patterns of signed
shifts, a family of maps on infinite words.

22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph