A5 DETEST

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$$\begin{align}\dot{x}_{0}&=1.0\\\dot{x}_{1}&=\frac{- x_{0} + x_{1}}{x_{0} + x_{1}}\end{align}$$

Derived from a non-autonomous equation with trajectories in the form of a spiral curve.
Link to DETEST description

homogeneous

$$\begin{align}x_{0}(0)&=0.0\\x_{1}(0)&=4.0\end{align}$$

No exact solution provided.

Problem has not been tested yet.

$$\begin{align}x_{0}(0)&=0.0\\x_{1}(0)&=\left[ 4.0, 4.25\right]\end{align}$$

No exact solution provided.

Problem has not been tested yet.

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