Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Equation rotA = K A   We show that when correctly formulated the equation $\nabla \times
\mbox{\boldmath $a$} = \kappa \mbox{\boldmath $a$}$ does not exhibit some
inconsistencies atributed to it, so that its solutions can represent physical
fields.

6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics