Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two Differentially Private Rating Collection Mechanisms for Recommender
  Systems   We design two mechanisms for the recommender system to collect user ratings.
One is modified Laplace mechanism, and the other is randomized response
mechanism. We prove that they are both differentially private and preserve the
data utility.

27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex