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05:33
@DavidRoberts If you think that creation of is a reasonable thing to do, perhaps one could use the recent question: Convergence of sequences formed by orthocenters, incenters, and centroids in repeated triangle constructions.
In that way, the tag would be created without bumping any old questions.
Of course, the clean-up of the tag would require to bump a few old questions - maybe if there are many such question, one could wait whether somebody objects to the new tag, before starting retaggin.
@SamHopkins Since you brought up the issue, I'll direct this to you as well. (I thought that chat is better - to avoid having too long comment thread.) In particular, I will check whether you saw David Roberts' message:
yesterday, by David Roberts
@MartinSleziak Yeah, I don't know anything about specific questions that already have what might be tagged as (classical-analytic-geometry), or how many there are. If the person who raised the issue knows of them, they might point some out, or re-tag themselves if they can
 
10 hours later…
16:08
62
Q: Can the Riemann hypothesis be undecidable?

ShaqqThe question is contained in the title; I mean the standard axioms ZFC. The wiki link: Riemann hypothesis. There are finite algorithms allowing one to decide if there are non-trivial zeroes of the $\zeta$-function in the domains whose union exhausts the whole strip $0<\Re z<1$, but this does not ...

 
2 hours later…
17:39
@MartinSleziak I don't understand how to respond to your chat messages, but it looks like you identified many questions where the "analytic-geometry" is currently used to mean "coordinate Euclidean geometry." I would imagine it is in fact not hard to tell apart the two uses on most MO questions. But, for what it's worth, I don't love the tag name "classical-analytic-geometry" — Sam Hopkins 49 mins ago
Well, the name (classical-analytic-geometry) was suggested by @DavidRoberts - perhaps you have another suggestion what to call a tag for such question. (If such tag is actually needed - that's for discussion, too.) — Martin Sleziak 13 secs ago
 
4 hours later…
21:57
I think possibly such a tag is not needed. The questions with that tag tend to be very elementary, as mentioned. On the other hand, I think the new "analytic geometry" is a very hot topic in algebraic geometry right now (because of the influence of Scholze, etc.) — Sam Hopkins 4 hours ago

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