Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discussion: The Dantzig selector: statistical estimation when $p$ is
  much larger than $n$   Discussion of ``The Dantzig selector: Statistical estimation when $p$ is much
larger than $n$'' [math/0506081]

15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc