Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite Hyperfields of Order $n\leq 5$   In this paper, the author introduces the concept and basic properties of
finite (commutative) hyperfields. Also, the author shows that, up to
isomorphism, there are exactly 2 hyperfields of order 2; 5 hyperfields of order
3; 7 hyperfields of order 4; 27 hyperfields of order 5. Those hyperfields could
be first hand materials for those who are doing relevant researches.

36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph