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Achieving unanimous opinions in signed social networks
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.ORCID iD: 0000-0003-4142-6502
SISSA, International School for Advanced Studies,Trieste, Italy; Magneti Marelli S.p.A., Venaria Reale (TO), Italy.
2014 (English)In: Control Conference (ECC), 2014 European, IEEE , 2014, 184-189 p.Conference paper (Refereed)
Abstract [en]

Being able to predict the outcome of an opinion forming process is an important problem in social network theory. However, even for linear dynamics, this becomes a difficult task as soon as non-cooperative interactions are taken into account. Such interactions are naturally modeled as negative weights on the adjacency matrix of the social network. In this paper we show how the Perron-Frobenius theorem can be used for this task also beyond its standard formulation for cooperative systems. In particular we show how it is possible to associate the achievement of unanimous opinions with the existence of invariant cones properly contained in the positive orthant. These cases correspond to signed adjacency matrices having the eventual positivity property, i.e., such that in sufficiently high powers all negative entries have disappeared. More generally, we show how for social networks the achievement of a, possibily non-unanimous, opinion can be associated to the existence of an invariant cone fully contained in one of the orthants of ℝless thansupgreater thannless than/supgreater than.

Place, publisher, year, edition, pages
IEEE , 2014. 184-189 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-110465DOI: 10.1109/ECC.2014.6862161ISI: 000349955700031ISBN: 978-3-9524269-1-3OAI: diva2:747224
2014 European Control Conference (ECC)
Available from: 2014-09-16 Created: 2014-09-12 Last updated: 2015-09-22

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Altafini, Claudio
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Automatic ControlThe Institute of Technology
Electrical Engineering, Electronic Engineering, Information Engineering

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