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Feature requests: ambiguous/overloaded tags

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    So I just retagged all the "k-theory" questions with "kt.k-theory-homology" but I realized that there are quite a few "analysis" and "differential-equations" tags out there that would be well served with replacements by (e.g.) "ca.classical-analysis" or "ap.analysis-of-pdes" or something like "odes" or "ordinary-differential-equations". Also, there are two "ca.*" tags, one with the odes bit and one without. I think these should be fixed, but a) there are quite a few and b) I just applied the "ap.analysis-of-pdes" tag to the "differential-equations" questions that were obviously (to me) ONLY about PDE.

    tl;dr--"analysis" and "differential-equations" are overloaded/overused/ambiguous, many should be replaced with arxiv and/or ODE tags. Also, the two "ca.*" tags should be merged. Thoughts?
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    I've just merged [ca.classical-analysis-ode] to [ca.classical-analysis]. Let me know if I should switch it the other way. The proper name is "Classical Analysis and ODEs", and we don't otherwise abbreviate, but as the shorter tag already predominated (well, 17 to 10), I went with that.

    I agree that many of the analysis and differential-equations tags should be replaced. Let me know if there are any tag merges that need a moderator, but it seems unfortunately that this requires by-hand attention.

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    @Scott: I think your merger is the better of the two possibilities. I'd also like to see if we can reach consensus on turning "differential-equations" to "ordinary-differential-equations" or (e.g.) "ODE" (since tag lengths are bounded) and using the "ap.*" tag for PDE questions. (This strikes me as the most parsimonious option for improvement.)
    • CommentAuthorrwbarton
    • CommentTimeMar 5th 2010
     
    @Steve: I haven't been following your retagging, so I don't know whether it's applicable here, but in case you're not aware: the moderators have the ability to merge/rename tags, i.e., replace all occurrences of a tag X by Y. This is less effort, and also doesn't push people who are so unfortunate as to have asked a question just before a mass retagging off the front page, since it doesn't count as an edit.

    There is a thread for such requests here: http://tea.mathoverflow.net/discussion/34/2/tag-mergerename-reqests/
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    @Reid: Thanks for the heads-up. I retagged what I did mainly because it was easy and quick, didn't think about the front page since I always look at the new questions and not the actives (will keep this in mind henceforth though). Unfortunately the remaining retags I mentioned would have to be mostly case-by-case, I think.
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    @Steve re [ordinary-differential-equations]: There is a character limit on tags, so it would automatically be shortened to [ordinary-differential-equ].

    btw, if you have enough rep to vote on meta.SE, please vote up Scott's request to extend the character limit on tags if you haven't already done so.

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    I'm also wondering about retagging a lot of "geometry" stuff. It's not entirely clear to me what the metric geometry arxiv classification is supposed to cover, but I bet it's appropriate for most of those tags.
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    I would suggest not retagging if it isn't clear what the tags are supposed to cover. Perhaps a geometer will stop by and clarify?
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    Yeah, I'm not gonna do it. But it would be helpful if someone would.
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    We have [discrete-geometry] and [combinatorial-geometry] tags (which could do with some differentiating), but no [finite-geometry] tag. Admittedly there is a big overlap, but there is also non-trivial pairwise symmetric difference between the three.
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    @Steve: http://front.math.ucdavis.edu/categories/math

    Not completely informative, but a good start.
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    I actually posted something in [combinatorial-geometry] about simplicial sets, and they definitely do not fit in discrete or finite geometry, even though they are combinatorial and geometric objects.

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    @Steve, metric geometry was actually what I wanted to ask about in this old thread on "What is ...?" questions. I think tag ambiguity is often enough an issue that it needs to be looked into, but I don't have any good ideas how to fix this problem.

    @Mark, I found that page helpful from time to time, but it doesn't seem to match common usage. For example, I've seen the tag [mg.metric-geometry] deleted and replaced by [discrete-geometry] when the latter is listed under math.MG. I honestly don't know enough about MG to determine what's right and what's wrong, but this particular tag has been very puzzling to me.

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    @fpqc: Exactly.
    But some questions in both the disc-geom and comb-geom tags could do with retagging as the other, and some should be tagged [finite-geometry]. I don't have the rep, so if someone could oblige?
    • CommentAuthorrwbarton
    • CommentTimeApr 8th 2010
     
    There is a tag [algebraic] whose purpose I cannot discern--maybe it is accidental. Anyways, it doesn't seem like a good part of speech to be a tag name.
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    It looks like every question tagged [algebraic] also has meaningful tags. I propose merging [algebraic] into [tag-removed]. Can anybody think of any possible objections?
    • CommentAuthorHarry Gindi
    • CommentTimeApr 8th 2010 edited
     

    Why don't you just strip the tags off and let the tag die by itself. I have [tag-removed] blocked, so won't your approach make all of those questions invisible to me?

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    If I counted correctly, all but 2 of the questions tagged [algebraic] are also tagged [algebraic-geometry]. How about removing those 2 manually and merging the rest into [algebraic-geometry], so that only 2 questions get bumped and none get stigmatized?
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    Why don't you just strip the tags off and let the tag die by itself. I have [tag-removed] blocked, so won't your approach make all of those questions invisible to me?

    Because that bumps the questions to the top of the home page.

    I'll go with the solution Jonas proposed, but I reserve the right to merge unwanted tags into [tag-removed]. Rather than blocking this tag, you should simply remove it from the question whenever you see it at the top of the home page. If a question is really awful (and hence doesn't have any other tags at all, so you can't remove [tag-removed]), then it won't ever get bumped because everybody will ignore it, so you won't see it anyway. I don't see any reason to have [tag-removed] in your ignored list.

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