From a 4D perspective would 3D infinity exist?

[thefredman]

From the perspective of a 4D observer would 3D infinity appear to exist? Why/why not?

 

[PeterDonis]

From the perspective of a 4D observer would 3D infinity appear to exist?

What does this mean?

 

[mathman]

Reduce to 3d observer looking at 2d infinity. You will be able to answer your own question.