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 Mar19 awarded Sportsmanship Mar18 revised Solving an equation $\pmod {13}$ added 182 characters in body Mar18 answered Solving an equation $\pmod {13}$ Mar18 reviewed Leave Open The n-envelope problem Mar18 reviewed Close How to integrate this expression? Mar18 reviewed Close Most efficient way to learn mathematics Mar18 reviewed Close What does it take to get a job at a top 50 math program in the U.S.? Mar18 reviewed Leave Open General question about mathematical thinking Mar18 reviewed Close How to do well in higher level math classes Mar18 reviewed Leave Open Norm of some element in cyclotomic field Mar18 reviewed Leave Open Is Topology an important class to take before Functional Analysis? Mar18 reviewed Leave Open When writing a mathematical model for non-mathematical audiences, how do you begin a sentence defining a variables and parameters? Mar18 reviewed Leave Open Why is this true ? $(1-s)\zeta(s) = \sum_{k=0}^\infty \frac{\Gamma(k+1-s/2) A_k}{\Gamma(1-s/2) k!}$ Mar18 reviewed Leave Open Affine hull example Mar18 comment How to change the bounds of this iterated integral? Do a few example and you'll quickly get the hang of it. Mar18 comment How to change the bounds of this iterated integral? You first want to write down the inequalities which the old bounds imply for $x$ and $y$. You notice that the inequality for $x$ depends on $y$. Now you want to transform them into an equivalent pair of inequalities where the inequality for $x$ doesn't depend on $y$ anymore, but instead the one for $y$ depends on $x$. So you go $0\le x\le \sqrt{y}\le \sqrt{9}=3$ and you have the one for $x$. Now the one for $y$ follows b/c $0\le x\le \sqrt{y}$ is equivalent to $0\le x^2\le y$, and we also know $y\le 9$, so the inequality for $y$ is $x^2\le y\le 9$. Mar18 answered How to change the bounds of this iterated integral? Mar17 revised How would you prove that $2^{n-1} > n!$? added 2 characters in body Mar17 answered How would you prove that $2^{n-1} > n!$? Mar17 comment Schwarz 's lemma and sharp upper bound Yes, the function should be a Möbius transform. Try the one I gave you with suitable $z_0$....