Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strength of convergence in the orbit space of a transformation group   Let (G, X) be a second-countable transformation group with G acting freely on
X. It is shown that measure-theoretic accumulation of the action and
topological strength of convergence in the orbit space X/G provide equivalent
ways of quantifying the extent of non-properness of the action. These notions
are linked via the representation theory of the transformation-group
C*-algebra.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an