Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contact nonlinearities and linear response in jammed particulate
  packings   Packings of frictionless athermal particles that interact only when they
overlap experience a jamming transition as a function of packing density. Such
packings provide the foundation for the theory of jamming. This theory rests on
the observation that, despite the multitude of disordered configurations, the
mechanical response to linear order depends only on the distance to the
transition. We investigate the validity and utility of such measurements that
invoke the harmonic approximation and show that, despite particles coming in
and out of contact, there is a well-defined linear regime in the thermodynamic
limit.

34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con