Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exceptional points of an endomorphism of the projective plane   let f be an endomorphism of a complex projective space, of degree bigger than
one. Let us call an algebraic subset exceptional for f, if its inverse image is
set-theoretically equal to itself. J.-Y. Briend, S. Cantat and M. Shishikura
proved that an irreducible set like this is a linear subspace. In this paper,
we obtain a bound for the number of codimension-two exceptional subspaces. In
particular, we show that an endomorphism of the projective plane can be
completely ramified at nine points at most.

26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an