Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of cooperation by giving high-degree neighbors more help   In this paper, we study the effect of preferential assistance on cooperation
in the donation game. Cooperators provide benefits to their neighbors at some
costs. Defectors pay no cost and do not distribute any benefits. The total
contribution of a cooperator is fixed and he/she distributes his/her
contribution unevenly to his/her neighbors. Each individual is assigned a
weight that is the power of its degree, where the exponent $\alpha$ is an
adjustable parameter. The amount that cooperator $i$ contributes to a neighbor
$j$ is proportional to $j$'s weight. Interestingly, we find that there exists
an optimal value of $\alpha$ (which is positive), leading to the highest
cooperation level. This phenomenon indicates that, to enhance cooperation,
individuals could give high-degree neighbors more help, but only to a certain
extent.

20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
1
The categories of this paper are: cs