Julian Rosen
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 76 The $100$th derivative of $(x^2 + 1)/(x^3 - x)$ 38 Does $f(x) = f(2x)$ for all real $x$, imply that $f(x)$ is a constant function? 27 How to find $\lim\limits_{x\to0}\frac{e^x-1-x}{x^2}$ without using l'Hopital's rule nor any series expansion? 24 Closed form for ${\large\int}_0^1\frac{\ln(1-x)\,\ln(1+x)\,\ln(1+2x)}{1+2x}dx$ 22 Infinite Series $\sum_{n=1}^\infty\frac{(H_n)^2}{n^3}$

### Reputation (7,764)

 +10 Is projection of a closed set $F\subseteq X\times Y$ always closed? +10 Value of $\lim_{n\to \infty}\frac{1^n+2^n+\cdots+(n-1)^n}{n^n}$ +20 What does it mean when a differential form “stays the same”? +10 Closed form for ${\large\int}_0^1\frac{\ln(1-x)\,\ln(1+x)\,\ln(1+2x)}{1+2x}dx$

### Questions (7)

 11 A field without a canonical square root of $-1$ 10 Homogeneous polynomials in two variables taking integer values 4 Demonstrating a coin is not fair with as few flips as possible 3 Algorithm for finding generators of an ideal 3 Power series identity [duplicate]

### Tags (129)

 215 calculus × 17 51 sequences-and-series × 9 95 real-analysis × 13 46 group-theory × 8 81 derivatives × 2 42 functions × 2 67 abstract-algebra × 17 39 commutative-algebra × 10 54 functional-equations × 4 38 integration × 6

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