Are inflation and expansion relativistic theories?

[geordief]

I don't think General Relativity  predicted either ,did it?

 

So ,when thinking about them is GR of any import?

For example ,with inflation it occured to me that with the enormous activity occurring it might be represented as space stretching and time stretching less(or contracting?)

 

But then I thought  "Maybe GR has nothing to do with this?"

[Genady]

As long as quantum gravity is not involved, yes, they are.

Yes, GR predicted that the universe is not stable, i.e., either expands or contracts.

But what do you mean by

17 minutes ago, geordief said:

time stretching ... or contracting

 

[geordief]

1 minute ago, Genady said:

 

But what do you mean by "time stretching..or contracting"

 

Well expansion is described  as space (that is not bound by gravity -ie the space between galaxies I think) increasing  uniformly with time.

In relativity it is said that time dilation is accompanied by a corresponding  spatial contraction(if I have that right).

Would the same apply in inflation or expansion?

(Not that I can detect a frame of reference to apply it to if it was applicable)

[Genady]

4 minutes ago, geordief said:

Would the same apply in inflation or expansion?

No, it does not. The time dilation and length contraction you mention apply to two inertial frames moving relative to each other. This is not the case in the expanding universe.