Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac Operator of a Conformal Surface Immersed in R^4: Further
  Generalized Weierstrass Relation   In the previous report (J. Phys. A (1997) 30 4019-4029), I showed that the
Dirac operator defined over a conformal surface immersed in R^3 is identified
with the Dirac operator which is generalized the Weierstrass- Enneper equation
and Lax operator of the modified Novikov-Veselov (MNV) equation. In this
article, I determine the Dirac operator defined over a conformal surface
immersed in R^4, which is reduced to the Lax operators of the nonlinear
Schrodinger and the MNV equations by taking appropriate limits. Thus the Dirac
operator might be the Lax operator of (2+1)- dimensional soliton equation.

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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ