Higher Dimensional Geometry

The cluster focuses on discussions about visualizing and understanding geometry in higher dimensions like 4D spaces, using analogies such as balloon surfaces and tesseracts, non-Euclidean manifolds, and references to 3Blue1Brown videos.

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Keywords

CSS youtube.com VR TIL dimensional dimension dimensions 3d space topology 4th 2d sphere higher

Sample Comments

dm319 Mar 19, 2022 View on HN

We're talking about being toriodal or curved in a 4th spatial dimension I assume?

dan_voronov Feb 17, 2025 View on HN

Why not in a three-dimensional space?

InclinedPlane Jul 25, 2012 View on HN

There are different kinds of dimensions. There are simple, Euclidian dimensions where each dimension is perfectly orthogonal to the others, where parallel lines never intersect, etc. But there are other possibilities, non-Euclidean spaces and volumes. This is where the example of the sphere comes in. If you were a 2-dimensional being you could be on a plane or you could be on the surface of a sphere. Similarly, if you are a 3-dimensional being, such as us, you could be within a simple R^3 volume

netsharc Nov 13, 2019 View on HN

Probably a mathematical construct, like a 4-dimensional cube.

BLKNSLVR Dec 10, 2025 View on HN

You're not thinking fourth dimensionally!

admiralrohan Oct 9, 2025 View on HN

Interesting way to explain this through multiple dimensions angle.

skinpop Oct 30, 2021 View on HN

What is it that makes 4d the hardest dimension in topology?

Akronymus Dec 10, 2020 View on HN

Why not try hyperbolic space too?

rndn Aug 10, 2015 View on HN

Could this be related to our 3 dimensions of space?

raincole Jul 3, 2024 View on HN

TIL a two dimensional plane isn't natural.