... Ω4.Therefore, in the fourth, sixth, seventh, and the eigth cases, we may use the conclusionsin the other cases to conclude our proof. The proof is complete.Theorem ESuppose that λ c/1 − a. Then, ... Equations, vol. 15 of Mathematical Modelling: Theory and Applications,Kluwer Academic Publishers, Dordrecht, The Netherlands, 2003.5 M. di Bernardo, C. J. Budd, A. R. Champneys, and P. Kowalczyk, ... case, we find the exact regions of attraction of the limit cycles. Then wedescribe our results in terms of our phase plane model 1.21 and compare them with what we have obtained for the phase...