Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Manifolds with two projective bundle structures   In this paper we classify varieties of Picard number two having two
projective bundle structures of any relative dimension, under the assumption
that these structures are mutually uniform. As an application we prove the
Campana--Peternell conjecture for varieties of Picard number one admitting
$\mathbb C^*$-actions of a certain kind.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin