Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Gain-assisted Superluminal Light Propagation"   Wang, Kuzmich and Dogariu, in their 20 July, 2000, Nature article, describe
an experiment ostensibly measuring superluminal speeds of 310c via a few
percent shift in time of an optical pulse undergoing anomalous dispersion in a
pumped medium. This paper seems to have become part of the superluminal lore
and is often referenced as a profound example of superluminality. We have
closely examined the article and find serious flaws that need to be addressed.

15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex