Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determinations of the Strong Coupling at HERA   The status of determinations of the QCD coupling constant, alphas, at HERA is
reviewed. Since jet final states provide the most relevant input to the HERA
determinations of alphas, the relevant methods used in and results from jet
physics are also discussed. Furthermore, HERA and world averages of alphas
values are presented. Finally, the HERA-PDF 1.6 proton parton distribution
function set which also uses jet final-state data is introduced.

22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: eess
12
The categories of this paper are: nucl-th