Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on Limitations on the superposition principle: superselection
  rules in non-relativistic quantum mechanics   This is a comment to the paper, Limitations on the superposition principle:
superselection rules in non-relativistic quantum mechanics by C Cisneros et al
1998 Eur. J. Phys. 19 237. doi:10.1088/0143-0807/19/3/005. The proof that the
authors construct for the limitation on the superposition of state vectors
corresponding to different sectors of the Hilbert space, partitioned by a
superoperator has a flaw as outlined below.

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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
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The categories of this paper are: q-alg