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Thread: Proof showing bijection

  1. February 26th 2009, 11:49 PM #1
    jzellt
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    Proof showing bijection

    Let A and B be sets. Show that there is a natural bijection between A X B and B X A.
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  2. February 27th 2009, 01:18 AM #2
    Halmos Rules
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    HINT: The first and simplest function that comes to mind is the one you need........
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