Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Jamming at zero temperature and zero applied stress: The
  epitome of disorder"   O'Hern, Silbert, Liu and Nagel [Phys. Rev. E. 68, 011306 (2003)] (OSLN) claim
that a special point $J$ of a "jamming phase diagram" (in density, temperature,
stress space) is related to random close packing of hard spheres, and that it
represents, for their suggested definitions of jammed and random, the recently
introduced maximally random jammed state. We point out several difficulties
with their definitions and question some of their claims. Furthermore, we
discuss the connections between their algorithm and other hard-sphere packing
algorithms in the literature.

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The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex