Recently I noticed that my square root symbol is looking really ugly:
The square root per se is not correctly connected to the overbar. The picture above is with a small zoom factor. When I zoom in we can see that the overbar is slightly below the top of the square root. Both look pretty bad.
At first I thought that it was due to the math font I'm using, so I tried the rawest possible example:
\documentclass{minimal}
\begin{document}
\[A_m = \sqrt{2\mathcal{S}(f)\Delta f}\]
\end{document}
And there we have it:
Also browsing through the Similar Questions while writing this one, I saw that this happens quite often (e.g.:This answer, and this one).
What causes this and how to solve it?
mwe.pdf
looks fine even at highest resolution on my Mac OS both with Adobe Acrobat and with Skim. (and also inside the Viewer in Firefox when going to the Dropbox link) – user4686 Nov 12 '17 at 15:27