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Computing with Large Populations Using Interactions

Abstract : We define a general model capturing the behavior of a population of anonymous agents that interact in pairs. This model captures some of the main features of opportunistic networks, in which nodes (such as the ones of a mobile ad hoc networks) meet sporadically. For its reminiscence to Population Protocol, we call our model \emph{Large-Population Protocol}, or LPP. We are interested in the design of LPPs enforcing, for every $\nu\in[0,1]$, a proportion $\nu$ of the agents to be in a specific subset of marked states, when the size of the population grows to infinity; In which case, we say that the protocol \emph{computes} $\nu$. We prove that, for every $\nu\in[0,1]$, $\nu$ is computable by a LPP if and only if $\nu$ is algebraic. Our positive result is constructive. That is, we show how to construct, for every algebraic number $\nu\in[0,1]$, a protocol which computes $\nu$.
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Contributor : Olivier Bournez <>
Submitted on : Tuesday, December 4, 2012 - 11:29:36 AM
Last modification on : Friday, March 27, 2020 - 2:56:46 AM
Long-term archiving on: : Saturday, December 17, 2016 - 7:42:19 PM


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  • HAL Id : hal-00760669, version 1



Olivier Bournez, Pierre Fraigniaud, Xavier Koegler. Computing with Large Populations Using Interactions. Mathematical Foundations of Computer Science 2012, MFCS'2012, Aug 2012, Slovakia. pp.234-246. ⟨hal-00760669⟩



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