... and overcome the maximum amplitude of 1.9. The scenario at Ω = [ 10; 18 ] in Fig. 8 is particularly interesting, because there is a variety of different possible attractors. This multistability is further examined in Fig. 9 , where we report an example of attractor-basins phase portrait, at Ω = 12...

... from codimension one bifurcations are obtained. Multistability near the codimension two bifurcation points is presented. Numerical simulations are given to validate the theoretical analysis. The characteristic matrix of Eq. 3 is 4 M ( λ , τ ) = ( λ + 1 ) I + α ( c e...