Top network posts

• 84 Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$?
• 73 Why is $e^{\pi \sqrt{163}}$ almost an integer?
• 67 If $a \mid m$ and $(a + 1) \mid m$, prove $a(a + 1) | m$.
• 53 Inverse of an invertible triangular matrix (either upper or lower) is triangular of the same kind
• 50 Comparing $\pi^e$ and $e^\pi$ without calculating them
• 48 Are all algebraic integers with absolute value 1 roots of unity?
• 46 Does $R[x] \cong S[x]$ imply $R \cong S$?
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