  We consider a $N$-particle model describing an alignment mechanism due to a
topological interaction among the agents. We show that the kinetic equation,
expected to hold in the mean-field limit $N \to \infty$, as following from the
previous analysis in [A. Blanchet, P. Degond, Topological interactions in a
Boltzmann-type framework, J. Stat. Phys., 163 (2016), pp. 41-60.] can be
rigorously derived. This means that the statistical independence (propagation
of chaos) is indeed recovered in the limit, provided it is assumed at time
zero.
