Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Partially user-irrepressible sequence sets and conflict-avoiding codes   In this paper we give a partial shift version of user-irrepressible sequence
sets and conflict-avoiding codes. By means of disjoint difference sets, we
obtain an infinite number of such user-irrepressible sequence sets whose
lengths are shorter than known results in general. Subsequently, the newly
defined partially conflict-avoiding codes are discussed.

36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
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
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas