Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tremain equiangular tight frames   Equiangular tight frames provide optimal packings of lines through the
origin. We combine Steiner triple systems with Hadamard matrices to produce a
new infinite family of equiangular tight frames. This in turn leads to new
constructions of strongly regular graphs and distance-regular antipodal covers
of the complete graph.

9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org