no code implementations • 13 Feb 2024 • Marios Papachristou, M. Amin Rahimian
How can individuals exchange information to learn from each other despite their privacy needs and security concerns?
1 code implementation • 28 Jun 2023 • Marios Papachristou, M. Amin Rahimian
We show that the noise that minimizes the convergence time to the best estimates is the Laplace noise, with parameters corresponding to each agent's sensitivity to their signal and network characteristics.
1 code implementation • 22 Jun 2020 • Abdullah Almaatouq, M. Amin Rahimian, Abdulla Alhajri
By adopting a framework that integrates both the structure of the social influence and the distribution of the initial estimates, we bring previously conflicting results under one theoretical framework and clarify the effects of social influence on the wisdom of crowds.
Social and Information Networks Physics and Society Applications
1 code implementation • 10 May 2019 • Dean Eckles, Hossein Esfandiari, Elchanan Mossel, M. Amin Rahimian
We study the task of selecting $k$ nodes, in a social network of size $n$, to seed a diffusion with maximum expected spread size, under the independent cascade model with cascade probability $p$.
Social and Information Networks Computational Complexity Probability Physics and Society
1 code implementation • 8 Oct 2018 • Dean Eckles, Elchanan Mossel, M. Amin Rahimian, Subhabrata Sen
To model the trade-off between long and short edges we analyze the rate of spread over networks that are the union of circular lattices and random graphs on $n$ nodes.
Social and Information Networks Probability Physics and Society 91D30, 05C80
no code implementations • 12 May 2017 • Jan Hązła, Ali Jadbabaie, Elchanan Mossel, M. Amin Rahimian
We study the computations that Bayesian agents undertake when exchanging opinions over a network.
no code implementations • 27 Nov 2016 • M. Amin Rahimian, Ali Jadbabaie
While such repeated applications of the Bayes' rule in networks can become computationally intractable, in this paper, we show that in the canonical cases of directed star, circle or path networks and their combinations, one can derive a class of memoryless update rules that replicate that of a single Bayesian agent but replace the self beliefs with the beliefs of the neighbors.
no code implementations • 10 Nov 2016 • M. Amin Rahimian, Ali Jadbabaie
In each case we rely on an aggregation scheme to combine the observations of all agents; moreover, when the agents receive streams of data over time, we modify the update rules to accommodate the most recent observations.