Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Landing Theorem for Periodic Rays of Exponential Maps   We answer a question of Schleicher by showing that, for an exponential map
with nonescaping singular value, every periodic ray lands. This is an analog of
a theorem of Douady and Hubbard concerning polynomials. We also prove a partial
converse: there are periodic external rays landing at all periodic points, with
the exception of at most one periodic orbit.

1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con