Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discussion of "Multivariate quantiles and multiple-output regression
  quantiles: From $L_1$ optimization to halfspace depth"   Discussion of "Multivariate quantiles and multiple-output regression
quantiles: From $L_1$ optimization to halfspace depth" by M. Hallin, D.
Paindaveine and M. Siman [arXiv:1002.4486]

11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph