Timo Willemsen
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 Dec 30 awarded Favorite Question Jul 2 awarded Curious Sep 13 awarded Yearling Jul 16 asked Fitting circle into an angle Oct 22 awarded Notable Question Jan 25 awarded Good Question Nov 17 awarded Yearling Oct 16 accepted How to compute this sum Oct 14 comment How to compute this sum Awesome, just what I needed :) Oct 14 revised How to compute this sum edited tags Oct 14 asked How to compute this sum Aug 19 awarded Popular Question Aug 18 accepted Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ Aug 17 awarded Nice Question Aug 17 comment Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ Austin, you're right. I've changed my question :) Aug 17 revised Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ deleted 1 characters in body Aug 17 comment Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ Whooow, cool trick, thanks for clearing this up :) It took me some time to understand it though xD The question is kinda harder then I expected :P But thanks though :D $e$ is a wonderful number. Aug 17 comment Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ @Sivaram I understand that's one of the properties of $e^x$, but I was wondering if there are any other numbers that has that property. I know there are not. But if people are so certain there's not another number that has that property, HOW do they know that. Aug 17 asked Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$ May 26 accepted Havel & Hakimi degree sequence theory