Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Doubly $\Lambda$-commuting row isometries, universal models, and
  classification   The goal of the paper is to study the structure of the k-tuples of doubly
$\Lambda$-commuting row isometries and the $C^*$-algebras they generate from
the point of view of noncommutative multivariable operator theory. We obtain
Wold decompositions, in this setting, and use them to classify the $k$-tuples
of doubly $\Lambda$-commuting row isometries up to a unitary equivalence. We
introduce a universal model in this setting, describe its invariant subspaces,
and develop a dilation theory on $\Lambda$-polyballs.

8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph