Threshold-based network structural dynamics

被引:0
|
作者
Kipouridis, Evangelos [1 ]
Spirakis, Paul G. [2 ,3 ]
Tsichlas, Kostas [3 ]
机构
[1] Univ Copenhagen, Basic Algorithms Res Copenhagen BARC, Univ Pk 1, DK-2100 Copenhagen, Denmark
[2] Univ Liverpool, Dept Comp Sci, Ashton Str, Liverpool L69 3BX, England
[3] Univ Patras, Comp Engn & Informat Dept, Patras, Greece
关键词
Network dynamics; Stabilization; ALGORITHMS; AUTOMATA;
D O I
10.1016/j.tcs.2022.12.019
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
The interest in dynamic processes on networks is steadily rising in recent years. In this paper, we consider the (alpha, /3)-Threshold Network Dynamics ((alpha, /3)-Dynamics), where alpha < /3, in which only structural dynamics (edge dynamics of the network) are allowed, guided by local threshold rules executed by each node. In particular, in each discrete round t, each active pair of nodes u and v, computes a value 6(u, v) (the potential of the pair) as a function of the local structure of the network at round t around the two nodes. If 6(u, v) < alpha then the link (if it exists) between u and v is removed; if alpha < 6(u, v) < /3 then an existing link among u and v is maintained; if /3 < 6(u, v) then a link between u and v is established if not already present. New nodes cannot be inserted as a result of the protocol, and existing nodes cannot be removed.The microscopic structure of (alpha, /3)-Dynamics appears to be simple, so that we are able to rigorously argue about it, but still flexible, so that we are able to design meaningful microscopic local rules that give rise to interesting macroscopic behaviors. Our goals are the following: a) to investigate the properties of the (alpha, /3)-Threshold Network Dynamics and b) to show that (alpha, /3)-Dynamics is expressive enough to solve complex problems on networks.Our contribution in these directions is twofold. We rigorously exhibit the claim about the expressiveness of (alpha, /3)-Dynamics, both by designing a simple protocol that provably computes the k-core of the network as well as by showing that (alpha, /3)-Dynamics are in fact Turing-Complete. Second and most important, we construct general tools for proving stabilization that work for a subclass of (alpha, /3)-Dynamics and prove speed of convergence in a restricted setting.(c) 2022 Elsevier B.V. All rights reserved.
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页数:16
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