Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective Matrix Methods in Commutative Domains   Effective matrix methods for solving standard linear algebra problems in a
commutative domains are discussed. Two of them are new. There are a methods for
computing adjoined matrices and solving system of linear equations in a
commutative domains.

15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio