Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A globally diagonalizable alpha^2-dynamo operator, SUSY QM and the Dirac
  equation   A new class of semi-analytically solvable MHD alpha^2-dynamos is found based
on a global diagonalization of the matrix part of the dynamo differential
operator. Close parallels to SUSY QM are used to relate these models to the
Dirac equation and to extract non-numerical information about the dynamo
spectrum.

25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin