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# Questions

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### Does an origin-centered ellipse in the plane intersect each $L^p$-circle at most 8 times?

jun 12 at 15:28 Ilya Bogdanov 1,964410

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### Technical question on perimeter of level sets

may 7 at 14:48 Ryan O'Donnell 2,403818

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### Proving univariate polynomials (defined by sums, binomial coeffs, etc.) are nonnegative: is it ‘routine’?

aug 11 at 3:19 fedja 20k24896

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### Approximation theory reference for a bounded polynomial having bounded coefficients

sep 19 at 20:04 Matthew Badger 1114

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### Uniform approximation of $x^n$ by a degree $d$ polynomial: estimating the error

jul 17 11 at 6:44 Andrew 1,013149

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### Who is L. A. Balashov?

dec 13 11 at 0:50 Boris Novikov 1,401139

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### If $K$ and $L$ are compact convex sets with smooth boundary, does their union have piecewise-smooth boundary?

apr 1 11 at 7:12 ACL 4,2851224

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### What are sufficient conditions on $f, g : \mathbb{R}^n \to \mathbb{R}$ such that $\{x : f(x) \geq t \} \cup \{ x : g(x) \geq u\}$ has piecewise-smooth boundary?

nov 9 10 at 14:52 Pietro Majer 19.8k12570

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### What is the time complexity of computing sin(x) to t bits of precision?

jul 16 10 at 5:28 Luke Gustafson 19112

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