3 ms·
My car is 3D but it's only ever car-shaped.
by wlesieutre 9y ago
My car is 3D but it's only ever car-shaped.
- thanatropism 9y agoYes, but can it be segmented in open regions which are homeo/diffeomorphic to subsets of the R²? (Canonical example: the Earth is a three-dimensional object, but looks 2D locally (at a neighborhood of any given point).