Scale-free networks from varying vertex intrinsic fitness.
A new mechanism leading to scale-free networks is proposed in this Letter. It is shown that, in many cases of interest, the connectivity power-law behavior is neither related to dynamical properties nor to preferential attachment. Assigning a quenched fitness value x(i) to every vertex, and drawing links among vertices with a probability depending on the fitnesses of the two involved sites, gives rise to what we call a good-get-richer mechanism, in which sites with larger fitness are more likely to become hubs (i.e., to be highly connected).
Caldarelli
G
G
INFM UdR ROMA1 Dipartimento Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, Italy.
Capocci
A
A
De Los Rios
P
P
Muñoz
M A
MA
D000465:Algorithms; D020407:Internet; D008962:Models, Theoretical; D011506:Proteins; D012944:Social Support
D011506:Proteins