Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density of polynomials in classes of functions on products of planar
  domains   We give sufficient conditions on planar domains for polynomials to be dense
in the algebras A and A-infinity of the product of these domains, endowed with
their natural topologies. We also characterize the uniform limits, with respect
to the chordal metric, of polynomials on the product of the closures of these
domains. The products may be finite products or infinite products, even
uncountable.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc