Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twistor lifts and factorization for conformal maps from a surface to the
  Euclidean four-space   A conformal map from a Riemann surface to the Euclidean four-space is
explained in terms of its twistor lift. A local factorization of a differential
of a conformal map is obtained. As an application, the factorization of a
differential provides an upper bound of the area of a super-conformal map
around a branch point.

23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph