Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On a comparison of Darboux and Riemann integrals in constructive
  analysis   An example of constructive (in A.A.Markov's sense) real-valued function,
which is integrable by Riemann, but is not integrable by Darboux, is
constructed.

5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an