Spyke

A failed attempt to comb a hairy 3-ball (2-sphere), leaving a tuft at each pole

23
lemmy.world

Only on a perfect sphere. Imperfections allow for places of overlap

8
Donjuanmereply
lemmy.world

Where do you keep them? Because if they're supported by, or attached to anything, or affected by gravity or pressure, I'm sorry to burst your bubble, they aren't perfect

3
GluWureply
lemm.ee

You can never have smooth hairy balls, if you have a donut though it can be smooth and hairy.

13

In German, it's called "Satz vom Igel" (verbatim: "Sentence from the hedgehog"). Sounds like some fable. 🙃

4

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Hairy Ball Theorem | Spyke