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### Questions (16)

 9 Are known transcendental numbers countable? 4 If $f$ and $g$ are integrable, then $h(x,y)=f(x)g(y)$ is integrable with respect to product measure. 4 Are open sets in $\mathbb{R}^2$ countable unions of disjoint open rectangles? 4 Does every set with finite nonzero measure have at most a countable number of disjoint subsets of nonzero measure? 2 How do you solve an equation involving the Weierstrass p-function?

### Reputation (288)

 +5 If $f$ and $g$ are integrable, then $h(x,y)=f(x)g(y)$ is integrable with respect to product measure. +10 How do you solve an equation involving the Weierstrass p-function? +5 Are open sets in $\mathbb{R}^2$ countable unions of disjoint open rectangles? +10 Is there a metric space whose circles look like Euclidean squares?

 4 Is there a metric space whose circles look like Euclidean squares? 2 Nice examples of groups which are not obviously groups 2 Is there such a thing as proof by example (not counter example) 1 Measurable with respect to the product measure 1 Given a real number, how do I produce an elliptic curve with j-invariant equal to that number?

### Tags (24)

 4 geometry 1 real-analysis × 7 2 logic 1 measure-theory × 4 2 philosophy 1 calculus × 2 2 proof-strategy 1 elliptic-curves × 2 2 soft-question 0 elliptic-functions × 2

### Account (1)

 Mathematics 288 rep 19