Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Endomorphisms of O_n which preserve the canonical UHF-subalgebra   Unital endomorphisms of the Cuntz algebra O_n which preserve the canonical
UHF-subalgebra F_n of O_n are investigated. We give examples of such
endomorphisms for which the associated unitary element in O_n does not belong
to F_n. One such example, in the case where n=2, arises from a construction of
a unital endomorphism on O_2 which preserves the canonical UHF-subalgebra and
where the relative commutant of the image in O_2 contains a copy of O_2.

33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con