Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Small non-Leighton two-complexes   How many two-cells must two finite CW-complexes have to admit a common, but
not finite common, covering? Leighton's theorem says that both complexes must
have two-cells. We construct an almost (?) minimal example with two two-cells
in each complex.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con