Can a closed universe expand forever?

  1. Most say that a closed universe would collapse. Recent observations show that the universe will probably keep on expanding forever. Does this mean we cannot live in a closed universe? Or, is there a loop hole which allows a closed universe to expand forever?
  2. jcsd
  3. mathman

    mathman 6,751
    Science Advisor
    Gold Member

    It depends on the geometry of the universe. 2-d analog: blow up a balloon and the surface can expand forever (unless it breaks).
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