Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some surfaces with maximal Picard number   For a smooth complex projective variety, the rank of the N\'eron-Severi group
is bounded by the Hodge number h^{1,1}. Varieties with rk NS = h^{1,1} have
interesting properties, but are rather sparse, particularly in dimension 2. We
discuss in this note a number of examples, in particular those constructed from
curves with special Jacobians.

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The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc