Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological properties of real algebraic varieties: du c\^ot\'e de chez
  Rokhlin   The survey gives an overview of the achievements in topology of real
algebraic varieties in the direction initiated in the early 70th by V.I.Arnold
and V.A.Rokhlin. We make an attempt to systematize the principal results in the
subject. After an exposition of general tools and results, special attention is
paid to surfaces and curves on surfaces.

10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph