Cucker-Smale model with normalized communication weights and time delay

Young-Pil Choi, Jan Haskovec*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Scopus citations


We study a Cucker-Smale-type system with time delay in which agents interact with each other through normalized communication weights. We construct a Lyapunov functional for the system and provide sufficient conditions for asymptotic flocking, i.e., convergence to a common velocity vector. We also carry out a rigorous limit passage to the mean-field limit of the particle system as the number of particles tends to infinity. For the resulting Vlasov-type equation we prove the existence, stability and large-time behavior of measure-valued solutions. This is, to our best knowledge, the first such result for a Vlasov-type equation with time delay. We also present numerical simulations of the discrete system with few particles that provide further insights into the flocking and oscillatory behaviors of the particle velocities depending on the size of the time delay.
Original languageEnglish (US)
Pages (from-to)1011-1033
Number of pages23
JournalKinetic and Related Models
Issue number4
StatePublished - Mar 6 2017


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