A5 DETEST

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

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.

[untested]

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

No exact solution provided.

[untested]

^* rounded (non-rigorously) to 5 decimal places to preserve screen real estate.