Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Granular entropy: Explicit calculations for planar assemblies   This paper proposes a new volume function for calculation of the entropy of
planar granular assemblies. This function is extracted from the antisymmetric
part of a new geometric tensor and is rigorously additive when summed over
grains. It leads to the identification of a conveniently small phase space. The
utility of the volume function is demonstrated on several case studies, for
which we calculate explicitly the mean volume and the volume fluctuations.

13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg