Top network posts

• 16 How to solve $y = \sqrt{k\sqrt{k\sqrt{k \sqrt{k\sqrt{\dots}}}}}$?
• 10 Clang modifies return value in destructor?
• 9 How can I show that $\left|\sum_{n=1}^\infty\frac{x}{n^2+x^2}\right|\leq\frac{\pi}{2}$ for any $x\in{\bf R}$?
• 9 Consider the trace map $M_n (\mathbb{R}) \to \mathbb{R}$. What is its kernel?
• 9 If $f(x)$ is discontinuous at $x=0$, can $\int_{-1}^1 f(x)dx$ exist.
• 8 If $a,b\in\mathbb R\setminus\{0\}$ and $a+b=4$, prove that $(a+\frac{1}{a})^2+(b+\frac{1}{b})^2\ge12.5$.
• 7 C++ signed and unsigned int vs long long speed
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