Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Popular difference sets   We provide further explanation of the significance of a construction in a
recent paper of Wolf [Israel J. Math. 179 (2010), 253-278] in the context of
the problem of finding large subspaces in sumsets.

13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas