Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The LEDA galaxy distribution: I. Maps of the Local Universe   In order to investigate the properties of large-scale structures of galaxies
in the universe, we present an analysis of their spatial distribution at
z$<$0.033. We used the LEDA extragalactic database containing over 1 million of
galaxies covering the all-sky and the SDSS data included in the public release
DR1, yielding to a sample of around 134,000 galaxies having a measured redshift
in two survey areas representing 690 sq. degrees. The results of the study are
2D, 3D maps and magnitude number counts of galaxies, drawn from B-band samples.
  Movies and high resolution figures are available on
http://www-obs.univ-lyon1.fr/cosmologie/helene.html

18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int