Christian Ivicevic
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 Nov 3 revised Is there a whole number $x\in\mathbb{Z}$ with $x\neq 0$ s.t. $\exp(x)$ is natural? Forgot to excluse the 0. Nov 3 asked Is there a whole number $x\in\mathbb{Z}$ with $x\neq 0$ s.t. $\exp(x)$ is natural? Nov 2 comment Prove that $x_{n+1}=\frac{x_n}{2}+\frac{1}{x_n}\geq\sqrt{2}$ @Dr.MV Yeah pretty similiar to my explained approach in the first part of my post. I was just wondering about the other approach and its correctness there. Nov 2 asked Prove that $x_{n+1}=\frac{x_n}{2}+\frac{1}{x_n}\geq\sqrt{2}$ Oct 1 comment Prove $\sum_{k=0}^n\binom{2n+1}{2k}=4^n$ This proof definitely is as short as requested but easy to grasp nonetheless! Oct 1 accepted Prove $\sum_{k=0}^n\binom{2n+1}{2k}=4^n$ Oct 1 asked Prove $\sum_{k=0}^n\binom{2n+1}{2k}=4^n$ Sep 30 revised Find a function $g(x,y)$ that satisfies the following conditions fixed LaTeX formatting Sep 30 suggested approved edit on Find a function $g(x,y)$ that satisfies the following conditions Sep 30 revised Find a function $g(x,y)$ that satisfies the following conditions added LaTeX formatting Sep 30 answered Find a function $g(x,y)$ that satisfies the following conditions Sep 30 suggested approved edit on Find a function $g(x,y)$ that satisfies the following conditions Sep 29 accepted Differentiation with respect to integral boundary Sep 29 accepted Properties of shortest walks and simple paths during optimization Sep 23 accepted Solving ODE $\dot{x}=\lambda x-b$ Sep 23 asked Solving ODE $\dot{x}=\lambda x-b$ Sep 23 comment Is there a subset of a non regular language that is regular @piperchester This comment is very old and it seems I deleted the file from my Dropbox - luckily I have an updated version. You will find the mentioned overview of languages on the last page of my cheatsheet. Sep 15 awarded Popular Question Sep 1 awarded Popular Question Jul 2 awarded Yearling