### GEORGE MASON UNIVERSITY DEPARTMENT OF MATHEMATICAL SCIENCES APPLIED AND COMPUTATIONAL MATHEMATICS SEMINAR

Speaker:Muruhan Rathinam, Department of Mathematics and Statistics, UMBC
Title: Convergence, stability and robustness of multidimensional opinion dynamics in continuous time

Abstract: We analyze a continuous time multidimensional opinion model where agents have heterogeneous but symmetric and compactly supported interaction functions. We consider Filippov solutions of the resulting dynamics and show strong Lyapunov stability of all equilibria in the relative interior of the set of equilibria. For the case of C1 interaction functions, we provide an alternative proof for the convergence of all trajectories as $t \to \infty$. We investigate robustness of equilibria when a new agent with arbitrarily small weight is introduced to the system in equilibrium. Assuming the interaction functions to be indicators, we provide a necessary condition and a sufficient condition for robustness of the equilibria. Our necessary condition coincides with the necessary and sufficient condition obtained by Blondel et al. for one dimensional opinions. This is joint work with Serap Tay Stamoulas.

Time: Friday, September 16, 2016, 1:30-2:20 p.m.

Place: Exploratory Hall, Room 4106

Department of Mathematical Sciences
George Mason University
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