Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective actions of the unitary group on complex manifolds   We classify all connected $n$-dimensional complex manifolds admitting an
effective action of the unitary group $U_n$ by biholomorphic transformations.
One consequence of this classification is a characterization of ${\bf C}^n$ by
its automorphism group.

12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an