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The code of the first image was provided by Squeamish Ossifrage in this answer. In wich language/program was plot? In JavaScript or GeoGebra?

enter image description here

Also, I found in YouTube the image below with the point at infinity (north pole) plot in a projective plane using stereographic projection. The YouTube channel is Trustica. I copy the picture from the website attached in the description of the video. What language/program was used? Any ideas?

Elliptic c

I tried to replicate the graphs in Mathematica but failed.

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    $\begingroup$ It is Asymptote as given in the asnwer Appendix A: Asymptote code for affine elliptic curve plot $\endgroup$
    – kelalaka
    Mar 17, 2021 at 21:22
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    $\begingroup$ For the second image: I saw the Trustica videos, too, and wanted to plot it myself. I wrote them, but never got an answer. I just assume that they did it with SageMath. If you find the sourcecode please post it here! I would love to plot it myself, too! $\endgroup$
    – Titanlord
    Mar 18, 2021 at 11:17
  • $\begingroup$ Thank you @kelalaka! I never hear about that language. $\endgroup$ Mar 18, 2021 at 22:32
  • $\begingroup$ here, and here some other examples. $\endgroup$
    – kelalaka
    Mar 18, 2021 at 22:33
  • $\begingroup$ @Titanlord It should be asymptote, too, at least you can make it. $\endgroup$
    – kelalaka
    Mar 18, 2021 at 22:38

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