Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sur les varietes CR de dimension 3 et les twisteurs   We prove that any real analytic strictly pseudoconvex CR 3-manifold is the
boundary (at infinity) of a unique selfdual Einstein metric defined in a
neighborhood. The proof uses a new construction of twistor space based on
singular rational curves.

33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
19
The categories of this paper are: eess
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin