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Unformatted text preview: Θ of both sides of last equation:
k • solving this: k 1
1+λΘ k = 1, at λ = λc
k p k λc k =
λc = k
k2 If k 2 → ∞ but k ﬁnite, then λc → 0.
• Unlike a threshold model, they ﬁnd node heterogeniety greatly
enhances onset of global cascade Next time: Coordination games and cascades
(I promise, it is more fun and accessible)
• Threshold models : ﬂip behavior once a certain number or
fraction of neighbors adopt new behavior.
• Diminishing re...
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This document was uploaded on 03/12/2014 for the course CSCI 289 at UC Davis.
- Winter '11