Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hamiltonian model for multidimensional epistasis   We propose and solve a Hamiltonian model for multidimensional epistastatic
interactions between beneficial mutations. The model is able to give rise
either to a phase transition between two equilibrium states, without any
coexistence, or exhibits a state where hybrid species can coexist, with gradual
passage from one wild type to another. The transition takes place as a function
of the "tolerance" of the environment, which we define as the amount of noise
in the system.

8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph