Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the classification of $\mathbb{Z}_4$-codes   In this note, we study the classification of $\mathbb{Z}_4$-codes. For some
special cases $(k_1,k_2)$, by hand, we give a classification of
$\mathbb{Z}_4$-codes of length $n$ and type $4^{k_1}2^{k_2}$ satisfying a
certain condition. Our exhaustive computer search completes the classification
of $\mathbb{Z}_4$-codes of lengths up to $7$.

3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat