Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kronecker Square Roots and The Block vec Matrix   Using the block vec matrix, I give a necessary and sufficient condition for
factorization of a matrix into the Kronecker product of two other matrices. As
a consequence, I obtain an elementary algorithmic procedure to decide whether a
matrix has a square root for the Kronecker product.

21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci