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Math Help - closed-compact

  1. #1
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    closed-compact

    when an interval is closed it must be or better it is compact..but what's the difference between closed and compact?
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  2. #2
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    Quote Originally Posted by Aglaia View Post
    when an interval is closed it must be or better it is compact..but what's the difference between closed and compact?
    A compact interval is closed and bounded (has finite endpoints). The interval [0,+infinity) is closed but not compact.
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