This article talks about a potential explanation of dark matter based on something called the "friedmon." I have no interest in the dark matter question, but the article has made me curious about this friedmon thing. Googling "friedmon" turns up very little.
The article says the friedmon is a solution to Einstein's equations of GR wherein an infinite expanse (field or space-time, I guess you would call it) sits as an object within another infinite expanse. Well, let me just quote the article:
"To an external observer, a friedmon looks like a micro blackhole with an electric charge the same as that of the electron. However, the friedmon's interior can be macroscopically large — up to the size of the known universe."
I believe the notion of an infinite universe sitting as a finite object in another infinite field is also central to the multiverse theory.
I'm just curious as to how you express this idea mathematically. At face value there appears to be a contradiction in the idea of an infinite universe which is also a finite object situated in some broader expanse. I would also appreciate if someone can point out a paper or something which shows the details of the friedmon solution to Einstein's equations of GR.