eng
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Leibniz International Proceedings in Informatics
1868-8969
2023-06-12
3:1
3:22
10.4230/LIPIcs.SAND.2023.3
article
Bond Percolation in Small-World Graphs with Power-Law Distribution
Becchetti, Luca
1
Clementi, Andrea
2
Pasquale, Francesco
2
Trevisan, Luca
3
Ziccardi, Isabella
3
Sapienza University of Rome, Italy
University of Rome Tor Vergata, Italy
Bocconi University, Milan, Italy
Full-bond percolation with parameter p is the process in which, given a graph, for every edge independently, we keep the edge with probability p and delete it with probability 1-p. Bond percolation is studied in parallel computing and network science to understand the resilience of distributed systems to random link failure and the spread of information in networks through unreliable links. Moreover, the full-bond percolation is equivalent to the Reed-Frost process, a network version of SIR epidemic spreading.
We consider one-dimensional power-law small-world graphs with parameter α obtained as the union of a cycle with additional long-range random edges: each pair of nodes {u,v} at distance L on the cycle is connected by a long-range edge {u,v}, with probability proportional to 1/L^α. Our analysis determines three phases for the percolation subgraph G_p of the small-world graph, depending on the value of α.
- If α < 1, there is a p < 1 such that, with high probability, there are Ω(n) nodes that are reachable in G_p from one another in 𝒪(log n) hops;
- If 1 < α < 2, there is a p < 1 such that, with high probability, there are Ω(n) nodes that are reachable in G_p from one another in log^{𝒪(1)}(n) hops;
- If α > 2, for every p < 1, with high probability all connected components of G_p have size 𝒪(log n).
https://drops.dagstuhl.de/storage/00lipics/lipics-vol257-sand2023/LIPIcs.SAND.2023.3/LIPIcs.SAND.2023.3.pdf
Information spreading
gossiping
epidemics
fault-tolerance
network self-organization and formation
complex systems
social and transportation networks