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?

103 points · 17 comments · view on lemmy.world

17 Comments

Isbjerg@feddit.dk · 67 pts · 1y (1 reply)

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.world · 7 pts · 1y

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

mumblerfish@lemmy.world · 44 pts · 1y (6 replies)

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]

insufferableninja@lemdro.id · 24 pts · 1y (5 replies)

I'm going to start calling area "2-dimensional volume"

mumblerfish@lemmy.world · 19 pts · 1y (4 replies)

Only if you also call length "1-dimensional volume".

Notyou@sopuli.xyz · 11 pts · 1y (3 replies)

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

ironhydroxide@sh.itjust.works · 7 pts · 1y

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

luciferofastora@lemmy.zip · 5 pts · 1y (1 reply)

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

threelonmusketeers@sh.itjust.works · 1 pts · 1y

"But- but this one goes to 11."

chknbwl@lemmy.world · 24 pts · 1y

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 · 10 pts · 1y
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Num10ck@lemmy.world · 7 pts · 1y (2 replies)

4D ounces

Cadeillac@lemmy.world · 5 pts · 1y (1 reply)

To freedom

edgemaster72@lemmy.world · 2 pts · 1y

is the only chance I have

EleventhHour@lemmy.world · -2 pts · 1y (3 replies)

4D also has duration

Skua@kbin.earth · 23 pts · 1y (1 reply)

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 · 2 pts · 1y

Ah, I see

Bassman1805@lemmy.world · 8 pts · 1y

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.