  The paper develops new sufficient conditions for synchronization of a network
of $N$ nonlinearly coupled Chua oscillators interconnected via the first state
coordinate only. The nonlinear coupling strength is governed by a function
residing within a sector, i.e. it is bounded from above and below by linear
functions. The derived sufficient conditions provide a trade-off between the
characteristics of the sector and the interconnection topology of the network
to guarantee the synchronization of the oscillators.
