Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Kruskal's theorem that every 3 x 3 x 3 array has rank at most 5   In the first part of this paper, we consider 3 x 3 x 3 arrays with complex
entries, and provide a complete self-contained proof of Kruskal's theorem that
the maximum rank is 5. In the second part, we provide a complete classification
of the canonical forms of 3 x 3 x 3 arrays over F_2; in particular, we obtain
explicit examples of such arrays with rank 6.

32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys