Information retention conjecture for bounded-degree majority dynamics

Let GnninN{G_n}_{n in \mathbb N} be a sequence of finite graphs with degrees bounded by dd and such that

limnVn=.\lim_{n\to\infty}|V_n|=\infty.

Here, δ(Gn,p)\delta(G_n,p) denotes the minimum probability of error when reconstructing the initial common opinion from the limiting opinions, and pp is the probability that an initial opinion agrees with the underlying signal, with 12<p<1\frac12<p<1.

Information retention conjecture. For every such sequence and every 12<p<1\frac12<p<1,

limnδ(Gn,p)=0.\lim_{n\to\infty}\delta(G_n,p)=0.

This conjecture asserts that bounded-degree majority dynamics retains enough information about the initial signal to permit asymptotically error-free reconstruction on every sequence of growing finite graphs. The source provides no resolution, so the conjecture is recorded as open.

Sources & referencesView supporting material

Primary source

Omer Tamuz and Ran J. Tessler, “Majority Dynamics and the Retention of Information”, arXiv:1307.4035 (2014).

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