At the moment there is the oddly named synthetic-differential tag, which is being used for questions about synthetic differential geometry. I propose that this tag be renamed to synthetic-diff-geometry, perhaps with synonyms synth-differential-geom, sdg, and maybe synthetic-differential. (Apparently there is a 25 character limit on tag names...)
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4$\begingroup$ there is 25-character limit, AFAIR $\endgroup$ – Grigory M Oct 29 '15 at 10:38
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$\begingroup$ The maximum length for a tag is 25 characters. The specific proposal is not feasible. Please, suggest an alternative that is shorter. $\endgroup$ – quid♦ Oct 29 '15 at 10:38
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$\begingroup$ That explains the oddity... $\endgroup$ – Zhen Lin Oct 29 '15 at 10:39
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1$\begingroup$ @quid A recent StackStatus tweet hinted at possibly variable length; but I don't know what sites and what changes were made. $\endgroup$ – user147263 Oct 29 '15 at 12:10
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$\begingroup$ @NormalHuman this is interesting, I was not aware of this. I just tried to add a 26 character tag on main, and it gives the usual warning. Thus, it seems on this site we are (still) at 25. $\endgroup$ – quid♦ Oct 29 '15 at 12:41
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To stay within the 25 character limit, we could rename it to synthetic-diff-geo, possibly with synonyms such as synthetic-differential and sdg.
(If someone starts typing "synthetic differential geometry" into the tag bar, we want them to find the tag. So the name should start with "synthetic" at least.)
