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. 2017 Aug 23;12(8):e0182178. doi: 10.1371/journal.pone.0182178

Fig 4. State variables x1(t) [solid line]; x2(t) [dashed line]; and x3(t) [dotted line] as a function of t in Example 3.

Fig 4

Note that each state variable converges to a periodic function with a period T = 8.