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ODE: Lotka-Volterra
ID:  81c92c54b7645184f96b4c1b9733591b
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xd0 = 2.0*x0*(1.0-x1)
xd1 = -x1*(1.0-x0)
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IVP: 75
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x0 = 1.0
x1 = 3.0
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IVP: 114
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x0 = [0.95,1.05]
x1 = [2.95,3.05]