> The idea is to have something that locally, if you look only at the surrounding nodes, always looks like a neat n-dimensional grid. But the global topology ca

> The idea is to have something that locally, if you look only at the surrounding nodes, always looks like a neat n-dimensional grid. But the global topology can be totally whacky. That sounds similar to the mathematical definition of a manifold: something that locally looks like an Euclidean space, but globally isn't.