Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New method for the 3D Ising model   A simple, general and practically exact method is developed for the
equilibrium properties of the macroscopic physical systems with translational
symmetry. Applied to the Ising model in two and three dimension, a modest
calculation gives the spontaneous magnetization and the specific heat to less
than 1% error.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th