Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From force distribution to average coordination number in frictional
  granular matter   We study the joint probability distribution of normal and tangential
frictional forces in jammed granular media, $P_{\mu}(f_t, f_n)$, for various
friction coefficient $\mu$, especially when $\mu = \infty$. A universal scaling
law is found to collapse the data for $\mu=0$ to $\infty$ demonstrating a link
between force distribution $P_{\mu}(f_t, f_n)$ and average coordination number,
$z^{\mu}_c$. The results determine $z_c^\mu$ for a finite friction coefficient,
extending the constraints counting argument of isostatic granular packing to
finite frictional packings.

11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio