Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cyclic Codes from Cyclotomic Sequences of Order Four   Cyclic codes are an interesting subclass of linear codes and have been used
in consumer electronics, data transmission technologies, broadcast systems, and
computer applications due to their efficient encoding and decoding algorithms.
In this paper, three cyclotomic sequences of order four are employed to
construct a number of classes of cyclic codes over $\gf(q)$ with prime length.
Under certain conditions lower bounds on the minimum weight are developed. Some
of the codes obtained are optimal or almost optimal. In general, the cyclic
codes constructed in this paper are very good. Some of the cyclic codes
obtained in this paper are closely related to almost difference sets and
difference sets. As a byproduct, the $p$-rank of these (almost) difference sets
are computed.

22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
25
The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph