Smooth torus eversion I asked a vague question about torus eversion earlier, with no hard math, so while I'm at it, how about this one, which may involve hard math: "Everybody knows" that Stephen Smale showed us how to evert a sphere without tearing or creasing: < Has anyone done the same with a torus?

This seems to suggest the answer is yes. Séquin goes in to some detail in this document and I'll add the image he references, made by Cheritat.

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