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niktemadur@lemmy.world to Ask Science@lemmy.worldEnglish · 9 个月前

If a 1D figure has length, a 2D figure has area, and a 3D figure has volume, are there names for what's inside 4D, 5D figures and so on?

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If a 1D figure has length, a 2D figure has area, and a 3D figure has volume, are there names for what's inside 4D, 5D figures and so on?

niktemadur@lemmy.world to Ask Science@lemmy.worldEnglish · 9 个月前
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  • Isbjerg@feddit.dk
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    9 个月前

    I think you are looking for Lebesque measure, wikipage.

    Quote: “For lower dimensions n = 1, 2, or 3, it coincides with the standard measure of length, area, or volume. In general, it is also called n-dimensional volume, n-volume, hypervolume, or simply volume.”

    • niktemadur@lemmy.worldOP
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      9 个月前

      Wonderful answers all around, but this seems to be the succinct, specific one-word answer: it’s a Lebesgué!

  • mumblerfish@lemmy.world
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    9 个月前

    You’d just continue saying ‘volume’, alternatively ‘k-dimensional volume’ or ‘volume of the n-dimensional object’. Like for spheres: https://en.m.wikipedia.org/wiki/Volume_of_an_n-ball

    The n-dimensional volume of a Euclidean ball of radius R in n-dimensional Euclidean space is:[1]

    • {isplaystyle V{n}(R)={rac {i ^{n/2}}{amma {igl (}{frac {n}{2}}+1{igr )}}}R^{n},}
    • insufferableninja@lemdro.id
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      9 个月前

      I’m going to start calling area “2-dimensional volume”

      • mumblerfish@lemmy.world
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        9 个月前

        Only if you also call length “1-dimensional volume”.

        • Notyou@sopuli.xyz
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          9 个月前

          What happens if I turn the dimensional volume up to 11?

          • ironhydroxide@sh.itjust.works
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            9 个月前

            Well if it’s in 1-dimensional space, then you have a line the length of 11 units.

          • luciferofastora@lemmy.zip
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            9 个月前

            Well, you could just make 10 higher and make that the highest

            • threelonmusketeers@sh.itjust.works
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              9 个月前

              “But- but this one goes to 11.”

  • deuces@lemmy.world
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    9 个月前

    A popular example of a four-dimensional polytope is the Tesseract, which is just a 4D cube. Four dimensional and beyond polytopes have what is called a hypervolume. This can be calculated by using Lebesgue measure, which is beyond my understanding of mathematics.

    Fun fact: four-dimensional analysis is common in the development of modern parallel supercomputing!

  • Apytele@sh.itjust.works
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    9 个月前

    Also try the math comms this is more of a math question and also I really really wanna know the answer.

  • Num10ck@lemmy.world
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    9 个月前

    4D ounces

    • Cadeillac@lemmy.world
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      9 个月前

      To freedom

      • edgemaster72@lemmy.world
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        9 个月前

        is the only chance I have

  • EleventhHour@lemmy.world
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    9 个月前

    4D also has duration

    • Skua@kbin.earth
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      9 个月前

      Only if time is your fourth dimension. OP is likely asking about a fourth spatial dimension, since that’s much more in keeping with the progession of 1D > 2D > 3D

      • EleventhHour@lemmy.world
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        9 个月前

        Ah, I see

    • Bassman1805@lemmy.world
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      9 个月前

      In specific applications where it is useful to consider time as a 4th spacial dimension.

      So if you’re not talking about relativity, it’s probably not.

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