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LeftRedditOnJul1@lemmy.world to Wikipedia@lemmy.worldEnglish · 11 个月前

Hairy Ball Theorem

en.m.wikipedia.org

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  • cross-posted to:
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Hairy Ball Theorem

en.m.wikipedia.org

LeftRedditOnJul1@lemmy.world to Wikipedia@lemmy.worldEnglish · 11 个月前
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  • cross-posted to:
  • taneggs@lemmy.ca
Hairy ball theorem - Wikipedia
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  • 4am@lemm.ee
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    11 个月前

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

  • Donjuanme@lemmy.world
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    11 个月前

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

    • ivanafterall ☑️@lemmy.world
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      11 个月前

      Damn these perfect balls of mine!

      • Donjuanme@lemmy.world
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        11 个月前

        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

        • FooBarrington@lemmy.world
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          11 个月前

          They are perfect to me 🥰

  • Beacon@fedia.io
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    11 个月前

    Huh?

    • GluWu@lemm.ee
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      11 个月前

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

      • surewhynotlem@lemmy.world
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        11 个月前

        Yeah you can. Just tuck the last bit into your arse hole.

  • Zachariah@lemmy.world
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    11 个月前

    do chocolate salty balls next

  • Ephera@lemmy.ml
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    11 个月前

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

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