A Are our equations for this universe valid in all universes?

[cosmicalset]

If we live in a multiverse, are our equations about this universe valid in all universes?

 

[PeterDonis]

You marked this thread as level "A". What proposed multiverse hypotheses in the literature are you familiar with?

 

[Arman777]

If we live in a multiverse, are our equations about this universe valid in all universes?

I am not an expert on this but I think It will not be the valid. For example think electrons mass or protons, or fine structure constant. If these values were different then our physics rules would be different.

Another approach is to think that every universe can have its own mathematical structure (or physical). Since there are infinite universes why wouldn't it be different ?

https://arxiv.org/abs/1008.3907

 

[phyzguy]

Since hypothetical "other universes" outside of our universe are not observable, if I said they were full of green pixies riding pink unicorns, how could you prove me wrong?

 

[Arman777]

Since hypothetical "other universes" outside of our universe are not observable, if I said they were full of green pixies riding pink unicorns, how could you prove me wrong?

That's possible in our universe.

 

[Chronos]

There are some basic physical properties that, if varied, could significantly afftect the nature of any universe. For example, a change in the fine structure constant could really foul things up. Varying the gravitational constant would also be horribly disruptive affectng things like the mass, luminosity, llife expectancy and fate of stars to name a few. Fortunately, physical constants in this universe appear to be well behaved and stable. Life in a universe with variable physical constantss would likely face huge challemges and poor long term prospect. To date we have no evidence of 'other' universes - which would be difficult to explain assuming our present universe is infintie. A universe that is not infinite would also pose serious explanatory difficulties.