Top network posts

• 241 'Obvious' theorems that are actually false
• 105 Reasoning that $ \sin2x=2 \sin x \cos x$
• 88 How to prove $\int_{-\infty}^{+\infty} f(x)dx = \int_{-\infty}^{+\infty} f\left(x - \frac{1}{x}\right)dx?$
• 84 What is the oldest open problem in geometry?
• 70 How can one prove that $e<\pi$?
• 68 Closed form for $\int_0^1\log\log\left(\frac{1}{x}+\sqrt{\frac{1}{x^2}-1}\right)\mathrm dx$
• 68 An integral involving Airy functions $\int_0^\infty\frac{x^p}{\operatorname{Ai}^2 x + \operatorname{Bi}^2 x}\mathrm dx$
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