- #1
binbagsss
- 1,259
- 11
This is probably a stupid question but does k=1,0,-1 correspond to closed,flat,open refer to space or space-times?
Looking at a derivation what each geometrically represents is only done when talking about the spatial part of the FRW metric.
As space can be flat and space-time still curved couldn't the , say k=0, space be flat, but space-time not flat.
Why is it that we say k=0 gives a flat 'universe' etc.
Thanks in advance
Looking at a derivation what each geometrically represents is only done when talking about the spatial part of the FRW metric.
As space can be flat and space-time still curved couldn't the , say k=0, space be flat, but space-time not flat.
Why is it that we say k=0 gives a flat 'universe' etc.
Thanks in advance