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Questions
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When is the image of a non Lebesgue-measurable set measurable?

dec 13 11 at 17:55 Robert Israel 10.8k●8●22

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Are there any non-linear solutions of Cauchy’s equation ($f(x+y)=f(x)+f(y)$) without assuming the Axiom of Choice?

mar 6 11 at 16:25 Andres Caicedo 14.4k●1●42●79

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Why is it OK to rely on the Fundamental Theorem of Arithmetic when using Gödel numbering?

jan 31 11 at 15:45 Amit Kumar Gupta 2,909●10●26