Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DNA codes over two noncommutative rings of order four   In this paper, we describe a new type of DNA codes over two noncommutative
rings $E$ and $F$ of order four with characteristic 2. Our DNA codes are based
on quasi self-dual codes over $E$ and $F$. Using quasi self-duality, we can
describe fixed GC-content constraint weight distributions and
reverse-complement constraint minimum distributions of those codes.

6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th