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Thread: 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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    $\displaystyle A$\$\displaystyle B$ (or $\displaystyle A-B$) is the relative complement of $\displaystyle A$ in $\displaystyle B$.

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