Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological boundaries of covariant representations   We associate a boundary $\mathcal B_{\pi,u}$ to each covariant representation
$(\pi,u,H)$ of $C^*$-dynamical system $(G,A,\alpha)$ and study the action of
$G$ on $\mathcal B_{\pi,u}$ and its amenability properties. We relate rigidity
properties of traces on the associated crossed product C*-algebra to
faithfulness of action of the group on this boundary.

22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas