TIL about the existence of the Hairy Ball Theorem. http://en.wikipedia.org/wiki/Hairy_ball_theorem …
-
-
@ozymandias314 But the arrow of time defines a vector field on the spacetime manifold, and by the HBT there may be points in spacetime... -
@St_Rev@ozymandias314 Is spacetime an n-sphere? -
@shlevy@ozymandias314 Spacetime in GR is a 4-manifold. Nobody knows if it's a sphere or torus or what.
End of conversation
New conversation
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.