Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The regularized free fall I -- Index computations   Main results are, firstly, a generalization of the Conley-Zehnder index from
ODEs to the delay equation at hand and, secondly, the equality of the Morse
index and the clockwise normalized Conley-Zehnder index.

16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph