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Universe

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Topologically ( not only using set theory ), we can arrange an infinite universe in such a way that it is contained by another infinite universe of the same dimension ? (as long as the contained universe remains coherent in its laws)
 
If you're asking if you can have a recursive structure of universes, all in the 3rd or 4th Dimension, then yes, you can.
 
Topologically ( not only using set theory ), we can arrange an infinite universe in such a way that it is contained by another infinite universe of the same dimension ? (as long as the contained universe remains coherent in its laws)
If there are 2 infinitely sized 3d universes, you could not make them contain each other. Though it is possible for 2 to coexist in the same cosmology due to bulk space (a higher dimensional space in between them).
Edit: um, never mind my answer then, a thread mod likely knows more about this stuff than me.
 
If there are 2 infinitely sized 3d universes, you could not make them contain each other. Though it is possible for 2 to coexist in the same cosmology due to bulk space (a higher dimensional space in between them).
I mean, it's fiction; the author can technically write whatever they want. It would just end up making all the higher dimensions High 1-B+ or something around there.
 
If you're asking if you can have a recursive structure of universes, all in the 3rd or 4th Dimension, then yes, you can.
And would all the universes contained be of the same infinite size? and i want to know if it's topologically possible, otherwise, yes authors can do what they want to do
 
And would all the universes contained be of the same infinite size? and i want to know if it's topologically possible, otherwise, yes authors can do what they want to do
Whether or not all the universes are infinite depends on the author. They can all be infinite; some may be finite.
 
But let's say an infinite structure contains another infinite structure, then would the size of the container be Uncountable infinite?
No, you can fit two infinities inside one another, without one being larger than the other.

For example;

(Natural Numbers); 1, 2, 3, 4, 5, 6...

(Even Numbers); 2, 4, 6, 8, 10, 12...

Technically, Natural Numbers contain Even Numbers; however, you can match them up one to one, making them equal.
 
No, you can fit two infinities inside one another, without one being larger than the other.

For example;

(Natural Numbers); 1, 2, 3, 4, 5, 6...

(Even Numbers); 2, 4, 6, 8, 10, 12...

Technically, Natural Numbers contain Even Numbers; however, you can match them up one to one, making them equal.
But can we apply set theory to a topological structure? It seemed to me that bijection in topology cannot be used to compare two structures
 
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