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ODE: B4 DETEST
ID:  c7572c25f9ee6407b75b4c150db3fec1
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xd0 = -x1-x0*x2/sqrt(x0**2+x1**2)
xd1 = x0-x1*x2/sqrt(x0**2+x1**2)
xd2 = x0/sqrt(x0**2+x1**2)
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IVP: 56
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x0 = 3.0
x1 = 0.0
x2 = 0.0
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IVP: 57
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x0 = [3.0,3.25]
x1 = 0.0
x2 = 0.0