Martin Ueding
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 Apr 21 awarded Autobiographer Apr 8 awarded Favorite Question Mar 19 accepted Is it legal to write $A_\mu = (a, b, c, d)$? Mar 5 comment Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? A comment to the last paragraph (below the rule): Also $\lim_{n\to \infty} \sum_{i=0}^n \frac{1}{n!} = \mathrm e \not\in \mathbb Q$, even though it is just the addition of rational numbers. The connection is the limit to infinity, I think. Nov 6 revised Is a matrix multiplied with its transpose something special? Use non-italic transpose symbol Sep 20 awarded Yearling May 11 comment Why the name 'FACTORIAL'? @Jens: I think that it only used by people who do not know the correct English word for it and use it because it sounds English and is close to the German word. Apr 18 awarded Popular Question Oct 10 awarded Popular Question Aug 5 awarded Yearling Jul 2 awarded Curious May 30 comment Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$? Ah, the inverse function theorem holds in general if it is invertible. Good to know! May 30 accepted Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$? May 29 revised Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$? Add duplicate May 29 asked Is $\dot u/\dot \phi$ is the same as $\mathrm du / \mathrm d\phi$? May 8 comment Two halls 6 and 9 meters perpendicularly intersect. Optimization @user2171981 I guess you should be able to carry it around the corner. May 8 asked Chain rule for tensor of family of tensor fields Mar 21 comment Why do we require radians in calculus? In Physics, radians are unitless, but sometimes still mentioned. Just like counts/s or something like that. I think it is good to make it explicit. Feb 27 awarded Good Question Feb 3 asked Closed complex integral that does not vanish