Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the necessary conditions for the occurrence of the
  "environment-induced superselection rules"   We briefly summarize the main recently obtained results concerning existence
of the (effective) necessary conditions for the occurrence of the
"environment-induced superselection rules" (decoherence).

17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an