Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy transport in anharmonic lattices close and far from equilibrium   The problem of stationary heat transport in the Fermi-Pasta-Ulam chain is
numerically studied showing that the conductivity diverges in the thermodynamic
limit. Simulations were performed with time-reversible thermostats, both for
small and large temperature gradients. In the latter case, fluctuations of the
heat current are shown to be in agreement with the recent conjectures of
Gallavotti and Cohen.

15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an