2D trajectory in minimum amount of time given min/max acceleration per axis

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I am having a little problem with determining a trajectory.

I have a 2D curve, say $\{x(\lambda), y(\lambda)\}$ where $\lambda$ is not time; it is only a parameter that describes the evolution of the curve.

The point can move with a max acceleration defined for every axis; so we will have a $maxAcc_x$ and a $maxAcc_y$. Acceleration can be chosen independently for every axis. I'd like to know the minimum time required to draw the curve.