Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The dual of the compressed shift   For an inner function u we discuss the dual operator for the well-known
compressed shift. We establish conditions for two dual compressed shifts to be
unitarily equivalent/similar and we describe the invariant subspace structure
for the dual.

6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th