Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surprises in Bose-Einstein correlations   Four experimental results, which seem to contradict the established ideas
about the Bose-Einstein correlations in multiple particle production processes,
are briefly presented and dicussed.

33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess