Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algebrodynamical Approach in Field Theory: Bisingular Solution and its
  Modifications   The criterion of differentiability of functions of quaternion variable is
used as the basis of some algebraic field theory. Its necessary consequences
are free Maxwell and Yang-Mills equations. The differentiability equations may
be integrated in twistor variables and are reduced to algebraic ones. In the
article we present bisingular solution and its topological modifications.
Related EM-fields appear to be just the well-known Born solution and its
modifications with singular structure of ring-like and toroidal topology.
General problems of the algebrodynamical approach are discussed.

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The categories of this paper are: alg-geom
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci