Phase portraits of the fractional-order discrete system (9): (a) periodic orbit for ν = 0.9996, (b) chaotic hidden attractor for ν = 0.9935, (c) periodic attractor for ν = 0.9434, (d) two limit cycles for ν = 0.9177, (e) periodic orbit for ν = 0.895, (f) hidden chaotic attractor for ν = 0.84.