Elliptic curves, points, zooming
I've noticed a problem. I plotted the elliptic curve y^2 = x^3 - x + 1 and added a point P. When I zoom in and out, P moves along the curve. I've tried fixing the object but it still happens. It's the same if I use the mouse or the on-screen zoom buttons.
It doesn't happen with parabolas y=x^2 or y^2=x.
I'm using classic Geogebra v6 on Linux. The same thing happens when using the online version in Chrome browser.
I don't remember this problem last time I plotted some elliptic curves a few weeks back, but I could have overlooked it then.