EDB — 1RK

In dotted purple the line of inflections. In dashed red the parabola where the derivative of the solution is infinite. In yellowthe solutions with initial data $y(0)=2$, $y(0)=1$, $y(0)=1/1000$.

In dotted purple the line of inflections. In dashed red the parabola where the derivative of the solution is infinite. Solutions are drawn with initial data $a=-1.4$ (”green”), $a=-1.0188$ ”orange”)and $a=-1.019$ (”yellow”) . Note that the latter two differ only by $0.0002$ in their initial data (indeed they are indistinguishable in the graph for $x>-1$), but then for $x<-1$ they move apart quickly, and for $x=-2$ they are respectively $3.25696$ and $2.54856$, with a difference of about $0.7$ !