multiplying shapes together, again
Sometimes I wish other people could see things like I do. I want to write a book called "Multiplying Shapes Together." But who would read it? The reason is because I think multiplying a polygon or a circle by itself produces one of the most amazing kinds of symmetry there is, but no one can ever see it because it only exists in the 4th dimension. If you square a circle, the resulting 4-dimensional shape has all the symmetry of a circle twice - but on two perpendicular planar axes. That's two planes that only intersect at one point. Isn't that amazing? The squared circle consist of two solid surfaces. Each surface is a cylinder wrapped around the other so that the ends meet. That can never happen in 3 dimensions. If you try to wrap two surfaces around each other, only one of them can go all the way around without breaking. Imagine living on a planet with two equators that don't intersect.
