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• 22 A cotangent series related to the zeta function
• 22 Why this $\sigma \pi \sigma^{-1}$ keeps appearing in my group theory book? (cycle decomposition)
• 15 Show that there's no continuous function that takes each of its values $f(x)$ exactly twice.
• 14 Proof that $\sum_{1}^{\infty} \frac{1}{n^2} <2$
• 13 Can Sturm-Liouville theory actually solve ODEs?
• 12 How can std::function be copied if it captures a unique_ptr?
• 11 Is there a book only about epsilon delta proofs?
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