Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-orthogonal codes from equitable partitions of association schemes   We give a method of constructing self-orthogonal codes from equitable
partitions of association schemes. By applying this method we construct
self-orthogonal codes from some distance-regular graphs. Some of the obtained
codes are optimal. Further, we introduce a notion of self-orthogonal subspace
codes. We show that under some conditions equitable partitions of association
schemes yield such self-orthogonal subspace codes and we give some examples
from distance-regular graphs.

28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph