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Question of real number

  1. Sep 11, 2011 #1
    If an arbitrary unbounded set + another arbitrary unbounded set, is it also gonna be an unbounded set?
  2. jcsd
  3. Sep 11, 2011 #2
    Sounds reasonable.
  4. Sep 11, 2011 #3


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    What does a set + another set mean? Do you mean the sets have real numbers and

    A+B = {x+y| x ε A and y ε B}

    or something else?
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