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Potential function V(ξ1,ξ2) in the bistable parameter domain characterized by the inequalities 1/g < λ2/λ1 < g. The dynamics settles down in either of the two attractors at (ξ1,st > 0,ξ2,st = 0) or (ξ1,st = 0, ξ2,st > 0) depending on the initial condition (ξ1(0),ξ2(0)). Consequently, the system (1) predicts that in the bistable parameter domain both one-handed grasps and two-handed grasps can be performed
