On 21 Dec 2013, at 10:22, LizR wrote:

On 21 December 2013 22:18, Bruno Marchal <marc...@ulb.ac.be> wrote:

On 20 Dec 2013, at 18:48, Richard Ruquist wrote:

Bruno: In that case a multiverse could contain another multiverse, a bit like a black hole could be a door to another universe.

Richard: I like that idea because Smolin hypothized and Poplawski confirmed using GR + spin that black holes yield at least an internal universe.

Interesting. Wish I could follow this more closely.

I think this is shown by the Penrose diagram of a rotating black hole, if I remember correctly. I certainly wrote a science fiction story on that basis once!

Any chance to get a PDF or link?

Bruno




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http://iridia.ulb.ac.be/~marchal/



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