Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amenability and exactness for dynamical systems and their C*-algebras   In this survey, we study the relations between amenability (resp. amenability
at infinity) of C*-dynamical systems and equality or nuclearity (resp.
exactness) of the corresponding crossed products.

15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph