Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polite actions of non-compact Lie groups   Based mainly on examples of interest in mechanics, we define the notion of a
polite group action. One may view this as not only trying to give a more
general notion than properness of a group action, but also to more fully
understand the role of invariant functions in describing just about everything
of interest in reduction.
  We show that a polite action of a symmetry group of a dynamical system admits
reduction and reconstruction.

20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics