Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Concrete Constructions of Real Equiangular Line Sets   We give some concrete constructions of real equiangular line sets. The
emphasis here is on {\em building blocks} for certain angles which are then
used to build up larger equiangular line sets. We concentrate on angles greater
than or equal to 1/7.

33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph