Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some properties of skew codes over finite fields   After recalling the definition of codes as modules over skew polynomial
rings, whose multiplication is defined by using an automorphism and a
derivation, and some basic facts about them, in the first part of this paper we
study some of their main algebraic and geometric properties. Finally, for
module skew codes constructed only with an automorphism, we give some BCH type
lower bounds for their minimum distance.

16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex