The Rabinovich–Fabrikant equations are a set of three coupled ordinary differential equations exhibiting chaotic behaviour for certain values of the parameters. They are named after Mikhail Rabinovich and Anatoly Fabrikant, who described them in 1979.
The equations are:
where α, γ are constants that control the evolution of the system. For some values of α and γ, the system is chaotic, but for others it tends to a stable periodic orbit.
Danca and Chen note that the Rabinovich–Fabrikant system is difficult to analyse (due to the presence of quadratic and cubic terms) and that different attractors can be obtained for the same parameters by using different step sizes in the integration. Also, recently, a hidden attractor was discovered in the Rabinovich–Fabrikant system.
These equilibrium points only exist for certain values of α and γ > 0.
γ = 0.87, α = 1.1
An example of chaotic behaviour is obtained for γ = 0.87 and α = 1.1 with initial conditions of (−1, 0, 0.5). The correlation dimension was found to be 2.19 ± 0.01. The Lyapunov exponents, λ are approximately 0.1981, 0, −0.6581 and the Kaplan–Yorke dimension, DKY ≈ 2.3010
γ = 0.1
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- Danca, Marius-F.; Chen, Guanrong (2004). "Birfurcation and Chaos in a Complex Model of Dissipative Medium". International Journal of Bifurcation and Chaos. World Scientific Publishing Company. 14 (10): 3409–3447. Bibcode:2004IJBC...14.3409D. doi:10.1142/S0218127404011430.
- Danca M.-F.; Kuznetsov N.; Chen G. (2017). "Unusual dynamics and hidden attractors of the Rabinovich-Fabrikant system". Nonlinear Dynamics. 88 (1): 791–805. arXiv:1511.07765. doi:10.1007/s11071-016-3276-1. S2CID 119303488.
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