Higher-order group interactions enable threshold-driven cascades
Adopted: 0% | Step: 0 | Mode: hypergraph
Complex contagion: adoption requires that a threshold fraction θ of group members are already adopters.
In a hypergraph, interactions involve groups (hyperedges) rather than pairs — capturing meetings, classes, households.
Higher-order contagion can exhibit abrupt (first-order) cascades: a tiny seed infects nothing until a critical density,
then triggers a global cascade. Compare pairwise (θ per neighbor) vs hyperedge (θ of entire group) dynamics.