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Math Help - Show A \ B countable...what is A \ B?

  1. #1
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    Show A \ B countable...what is A \ B?

    let A an be uncountable set and B a countable subset of A, show A\B is uncountable. I am not familiar with A \ B, and can't find it in the book!
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  2. #2
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    Quote Originally Posted by mtlchris View Post
    let A an be uncountable set and B a countable subset of A, show A\B is uncountable. I am not familiar with A \ B, and can't find it in the book!
    A\B just refers to the set difference. You might've seen A - B. A\B  \equiv A - B \equiv A \cap B^c.

    You can refer to Set Difference -- from Wolfram MathWorld
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