Top network posts

• 24 Could I ask a recommendation letter from a professor who left the university?
• 22 Derivative of a function w.r.t. another function.
• 16 How to evaluate $\sum\limits_{k=0}^{n-1} \sin^t(\pi k/2n)$?
• 13 Zeroes of a non elementary integral
• 13 Prove that $\lim_{n\rightarrow \infty} \frac{\log_{10}\lfloor\text{Denominator of } H_{10^n}\rfloor+1 }{10^n}=\log_{10} e$
• 13 Where is my argument that $\int_{-1}^{1} \sqrt{1-x^2}dx=0$ wrong?
• 13 What does .9 with a line above the 9 mean?
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