Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Abrupt transition in the structural formation of
  interconnected networks", F. Radicchi and A. Arenas, Nature Phys. 9, 717
  (2013)   A recent paper [F. Radicchi and A. Arenas, Nature Phys. 9, 717 (2013)]
presented the finding of an abrupt transition in the structure of
interconnected networks. This transition was said to be generic and to occur
even in networks of finite size. Furthermore, it was remarked that this
singular behaviour could be understood in the spirit of a first-order phase
transition. We show here that the generic singularity found in that paper is a
trivial consequence of the reducibility of the "supra-Laplacian" operator
studied. The singular changes observed are therefore not related to any
collective abrupt structural transformation in the interconnected networks.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th