Polygons (2), polyhedra (3), polychora (4-D), and polytopes (∀) can be represented as a graph — the same network-skeletal structure that models
- Facebook friends
- computer networks
- loop quantum gravity
- spin foams
- Ising magnetism
- molecules
- subway maps
- scientific collaboration
- artistic composition
- skitter plots of the WWW
- economies
- ecosystems
- and crystal lattices.
For example, this is a skeletal graph of a cube:
So are these:
And here’s a skeletal graph of a 4-cube (tesseract).
Triangle = Blood.
And now for the news. A triangular face of a polytope has the exact same topology as the blood types.
That’s weird, right?
