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Yang

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location Philadelphia, PA
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seen Feb 6 '12 at 21:40
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I am a math student.
33 reputation
 bio website visits member for 1 year, 4 months
3 badges
 location Philadelphia, PA seen Feb 6 '12 at 21:40
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2 Questions

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3
 Is $ \{ m+rn\mid m,n \in \mathbb{Z}\}$ dense in $\mathbb{R}$ if $r\in\mathbb{Q}$?
3
 If the image of a particular compact set under the function f is compact, is f continuous?

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+15 Is $ \{ m+rn\mid m,n \in \mathbb{Z}\}$ dense in $\mathbb{R}$ if $r\in\mathbb{Q}$?
+15 If the image of a particular compact set under the function f is compact, is f continuous?

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