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Is infinity part of any set?

  1. Jul 29, 2014 #1
    Is infinity part of any set?
     
  2. jcsd
  3. Jul 29, 2014 #2
    johann, I am locking this thread because you are making many different threads with just one question. Can you please make one thread containing all of your questions? Furthermore, can you also give the necessary background information such as why you ask this, what the relevant definitions are and what your thoughts are on the matter.
     
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