Greg Egan’s Dichronauts is set in a 2+2 dimensional universe, a condition Tegmark dismisses as ultrahyperbolic. Egan also has a rigid-body simulator using physics from that universe. It does seem rather unstable.
Greg Egan’s Dichronauts is set in a 2+2 dimensional universe, a condition Tegmark dismisses as ultrahyperbolic. Egan also has a rigid-body simulator using physics from that universe. It does seem rather unstable.