specific-question Which top-level tags would be suitable for What's so special about the Orthonormal base $\{e_n\}$ of $L^2[0,1]$, where $e_n(x)=e^{2\pi i nx }$? I see that the tag-info for ca.classical-analysis-and-odes mentions harmonic analysis. Maybe also fa.functional-analysis would be a possibility?

@ToddTrimble It seems that currently the topic which is most important is the discussion about the design. Especially now that the agreement between SE and MO was brought up it would probably good if moderators would comment on the issues related to the new design.

The issue I mentioned here is definitely not urgent (and probably not even very important) - so let's leave it at the moment. In the next year, I might again occasionally bother some of the mods with the tag related issues.

(I now that you've told me to ping you after Monday, but since I've seen that you've been online recently - your profile says "Last seen 15 mins ago" - I thought that I could mention at least this. But maybe I was too slow and I have already missed you.)

Got your message -- thanks.

specific-question I have removed the deprecated geometry tag from Some Problems On Apollonian Gasket. Are there some other tags which should be added?

Since it is related to Apollonian gasket I wondered whether fractals should be used. And circle packing seems to be related to discrete-geometry. But this specific question seems to be closer to plane geometry and triangle than to Appolonian gasket and fractals.