Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Action Model of Infall into the Virgo Cluster   The observed infall of galaxies into the Virgo Cluster puts strong
constraints on the mass of the cluster. A non-parametric fully non-linear
description of the infall can be made with orbit reconstructions based on
Numerical Action Methods. The mass of the cluster is determined to be $1.2
\times 10^{15} M_{\odot}$. The mass-to-light ratio for the cluster is found to
be seven times higher than the mean ratio found across the region within V=3000
km/s.

0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat