Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homogeneous 2-partite digraphs   We call a 2-partite digraph D homogeneous if every isomorphism between finite
induced subdigraphs that respects the 2-partition of D extends to an
automorphism of D that does the same. In this note, we classify the homogeneous
2-partite digraphs.

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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th