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. 2019 Mar 14;267(3):1859–1898. doi: 10.1016/j.jde.2019.03.005

Fig. 3.2.

Fig. 3.2

(a) A stable limit cycle created by the supercritical Hopf bifurcation of the system (3.14) with n = 0.1, p = 1.2, m = −0.6, q = 2 and a = 0.12. (b) An unstable limit cycle created by the subcritical Hopf bifurcation of the system (3.14) with n = 0.1, p = 1.2, m = −0.6, q = 0.6 and a = 0.18.