What is lost in the shadow of a tesseract? When I flattened a 4D hypercube into 2D, PCA lost to all 200 random projections

When you shine a light on a 3D object, it casts a 2D shadow. The shadow contains less information than the original—just as a ...
The Verge

‘The Fourth Dimension’ for iOS: learn to see in 4D (hands-on)

Hands-on impressions of The Fourth Dimension, an app that attempts to explain 4D geometry. Hands-on impressions of The Fourth Dimension, an app that attempts to explain 4D geometry. The Fourth ...
GIGAZINE

I played with the 4D Rubik's Cube

For the time being, I found it interesting to click appropriately to mix it in a colorful state and then continue to rotate it lightly, but it is impossible to undo this (affirmation) Right-click to ...