this post was submitted on 23 Apr 2026
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Science Memes

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[–] pankuleczkapl@lemmy.dbzer0.com 8 points 4 weeks ago* (last edited 4 weeks ago) (2 children)

This reasoning is pretty weird, but the conclusion is basically right. That is, there is absolutely no way to extend the conventional notion of volume to Rinfinity, which is basically what most people would imagine is the infinite equivalent of our dimensional space. Edit: what I mean by Rinfinity is a bit ambiguous, but let's say for the purpose of a hypersphere we want something like l^2 hilbert space to ensure no vectors with infinite length appear, then we have a separable space and the proof is complete.

[–] phoenixz@lemmy.ca 3 points 4 weeks ago (1 children)

most people would imagine

I imagine that most people don't have the faintest clue what you're talking about, though

[–] I_am_10_squirrels@beehaw.org 1 points 3 weeks ago

At most, they know the chemical formulas for a couple of quartz species

[–] ComicalMayhem@lemmy.world 2 points 4 weeks ago (1 children)

Wait, I thought the volume of a sphere approaches 0 as dimensions go to infinity, no? Thr general formula for the volume of any nth dimensional sphere has the gamma function in the denominator, which rises faster than whatever is in the numerator. At some point (5 dimensions, iirc) the volume starts decreasing

[–] pankuleczkapl@lemmy.dbzer0.com 2 points 3 weeks ago

Yes, but we aren't talking about the limit of the volume. We are talking about volume in actually infinite dimensional space.