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 Jun7 suggested rejected edit on How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? May30 accepted Number of permutations with a certain number of fixpoints May29 asked Number of permutations with a certain number of fixpoints Apr6 revised High school math definition of a variable: the first step from the concrete into the abstract… typographic improvements Apr6 suggested approved edit on High school math definition of a variable: the first step from the concrete into the abstract… Mar30 revised What is the expression of $n$ that equals to $\sum_{i=1}^n \frac{1}{i^2}$? Make links linky Mar30 suggested approved edit on What is the expression of $n$ that equals to $\sum_{i=1}^n \frac{1}{i^2}$? Mar30 answered 'Error term' in zeta function Mar28 accepted Is there a general approach to solve integrals of the form $\int\frac f{f'}$? Mar28 asked Is there a general approach to solve integrals of the form $\int\frac f{f'}$? Mar24 accepted How to come up with the gamma function? Mar11 comment How to come up with the gamma function? Okay. Thank you! Mar11 comment How to come up with the gamma function? YOur first interpretion is right. But your answer shows only that the integral satisfies the recurrence relation $\Gamma(x+1)=x\Gamma(x)$ and does not show how one can derive that integral. Mar11 comment How to come up with the gamma function? Thank you for that answer although you don't point out how one get's to $\int_0^\infty t^ne^{-1}\;\mathrm dt$. Mar11 comment How to come up with the gamma function? Sorry. I found out that the article actually contains an answer to my question, thus I removed my post. Mar11 asked How to come up with the gamma function? Feb26 comment How does one easily compute the limit of $a_n=(n\cdot \ln(\frac{n+1}{n}))^n$? As $n$ goes to what? Feb20 accepted Is there a reasonable generalization of the falling factorial for real exponents? Feb20 asked Is there a reasonable generalization of the falling factorial for real exponents? Feb16 comment $y''=(y')^{3} e^{y}$, some easy way to solve this non-linear differential equation? Did you tried using Wolfram Alpha? It can also shows you a step-by-step solution.