Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Love might be a second-order phase transition   The hypothesis of the human brain operation in vicinity of a critical point
has been a matter of a hot debate in the recent years. The evidence for a
possibility of a naturally occurring phase transition across this critical
point was missing so far. Here we show that love might be an example of such
second-order phase transition. This hypothesis allows to describe both love at
first sight and love from liking or friendship.

35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph