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The mixing time of the Newman--Watts small world | Louigi Addario-Berry
; Tao Lei
; | Date: |
18 Jan 2012 | Abstract: | "Small worlds" are large systems in which any given node has only a few
connections to other points, but possessing the property that all pairs of
points are connected by a short path, typically logarithmic in the number of
nodes. The use of random walks for sampling a uniform element from a large
state space is by now a classical technique; to prove that such a technique
works for a given network, a bound on the mixing time is required. However,
little detailed information is known about the behaviour of random walks on
small-world networks, though many predictions can be found in the physics
literature. The principal contribution of this paper is to show that for a
famous small-world random graph model known as the Newman--Watts small world,
the mixing time is of order (log n)^2. This confirms a prediction of Richard
Durrett, who proved a lower bound of order (log n)^2 and an upper bound of
order (log n)^3. | Source: | arXiv, 1201.3795 | Services: | Forum | Review | PDF | Favorites |
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