Numerical surgery for mean curvature flow of a torus and a sphere joined by a thin neck

A numerical experiment for a numerical mean curvature flow algorithm with surgery for a torus and a sphere joined by a thin neck. The surface first develops a pinch singularity, then the pinched-off spherical part shrinks to a round point. The colorbar corresponds to mean curvature.
The experiment uses quadratic surface finite elements and second order linearly implicit BDF method.
For more details see: arxiv.org/pdf/2210.14046.pdf

[@joergmueller477]

Amazing!

[@wipperod]

Hi! What software did you use for this? It looks amazing