From: Rafal Smigrodzki (rms2g@virginia.edu)
Date: Tue Aug 20 2002 - 17:25:26 MDT
Lee Corbin wrote:
What is the relationship, if any, between topological open and
closed, and open and closed universes?
### Thanks for asking that! I completely overlooked this wrinkle in
terminology, thinking only about the topological openness.
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> http://www.maths.lse.ac.uk/Personal/mark/topos.pdf
I'm only half-way through this eminently readable article (and for me
unfortunately, diagram 5 did not appear). The most remarkable part
so far: "It has only been in the previous five years [from 1999] that
serious investigations into the topology of the universe have been
undertaken [!]."
### This diagram didn't't appear for me either.
Rafal
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