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Two chemically coupled cells with gs = 2, gsyn = 0.05. a The projection on (v1, v2) plane. b Bifurcation diagram for the fast subsystem of two-cell model [Eqs. (4), (5)] with s = s1 = s2 taken as the bifurcation parameter. LC1, LC2 and LC3 refer to the fold limit cycle bifurcations, respectively. The description of the lines and other points is the same as that in Fig. 3b. c The enlargement of the bistability region in b. d The magnification of the rectangular area in c
