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Math Help - Set Theory Help - Simple Question

  1. #1
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    Set Theory Help - Simple Question

    I have got the following question

    (AUC)'\(CnD)

    What does the \ mean?

    Tried googling and looking in a book but cant find it
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  2. #2
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    A\ B (or A-B) is the relative complement of A in B.

    A-B=\{x\in A; x \notin B \}
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  3. #3
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    Opalg's Avatar
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    Set-theoretic difference. The expression  (A\cup C)'\setminus (C\cap D) means the set of all elements of  (A\cup C)' that are not in C\cap D.
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