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In a maths question, I had $A$ with a superscript of $c$, like this: $$A^c$$ What does this mean? In a Venn Diagram $A =$ to 5 and 6.

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is it complement? –  Yimin Feb 16 '13 at 7:31
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It is not a compliment. –  William Feb 16 '13 at 7:33
    
It is not a compliment, but the question was whether it was a complement? –  Gerry Myerson Feb 16 '13 at 11:20
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$A^c$ means the complement of the set $A$. It is the set of all elements (in some universal set) that are not in $A$.

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It is the set of all elements that are not in A respect to A's universal set M. –  B. S. Feb 16 '13 at 7:33
    
Oh. THANK YOU. You saved a lot of marks in my grade :D –  William Feb 16 '13 at 7:34
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@William your two comments are in diverge :) –  Kaster Feb 16 '13 at 8:06
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