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What is the result

  1. Mar 27, 2008 #1
    A U B = X
    C U B = Y
    C U A = Z

    knowing that A U B is the child of Y and Z
    Cold you help me rewiete the formila ?

    Thank you
  2. jcsd
  3. Mar 28, 2008 #2


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    Science Advisor

    ?? Define "child".
  4. Mar 29, 2008 #3
    I meant subset.
    I don't know how to use only U to display the relation
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