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12:02 AM

riemann-hypothesis has 300 deleted questions, compared to 187 non-deleted questions. Is it worth adding to the tag wiki some kind of admonishment against sharing your exciting new approach to proving RH?

5 hours later…

Martin Sleziak

5:12 AM

Jun 13 '20 at 13:14, by Martin Sleziak

That is 58.93% of questions in this tag was deleted, here are stats for all tags: https://data.stackexchange.com/mathoverflow/query/1162648/percentage-of-deleted-question-per-tag?num=50&Date1=2000-01-01&Date2=2021-01-01

Jun 13 '20 at 13:15, by Martin Sleziak

With 30.43% closed, it is among the tags with high percentage of closed questions: https://data.stackexchange.com/mathoverflow/query/1162425/percentage-of-closed-questions-per-tag?num=20&Date1=2000-01-01&Date2=2021-01-01

Jun 13 '20 at 13:30, by Martin Sleziak

I see that the above query with percentage of deleted questions has several tags which were removed (and thus have 100% of questions deleted) in the first places. If we're not interested in those: https://data.stackexchange.com/mathoverflow/query/1251170/percentage-of-deleted-questions-per-tag-only-existing-tags?num=50

Jun 13 '20 at 14:10, by Martin Sleziak

Of course, if we look only at tags with many questions, then there aren't so many deleted tags among them: https://data.stackexchange.com/mathoverflow/query/1162648/percentage-of-deleted-questions-per-tag?num=500&Date1=2000-01-01&Date2=2021-01-01 https://data.stackexchange.com/mathoverflow/query/1251170/percentage-of-deleted-questions-per-tag-only-existing-tags?num=500

@TimCampion Interestingly, SEDE only returns 237 deleted questions tagged riemann-hypothesis. So I suppose you have your count from somewhere else?

Posts where riemann-hypothesis was added/removed (with editors): data.stackexchange.com/mathoverflow/query/1105163/… data.stackexchange.com/mathoverflow/query/1038474/…

Most frequent taggers/removers for riemann-hypothesis: data.stackexchange.com/mathoverflow/query/1146497/… data.stackexchange.com/mathoverflow/query/1038477/…

Deleted questions with riemann-hypothesis: data.stackexchange.com/mathoverflow/query/883845/…

Tim Campion

5:32 AM

mathoverflow.net/search?q=%5Briemann-hypothesis%5D+deleted%3A1

(I just searched the tag with deleted:1)

maybe there are answers in that list?

yes

@MartinSleziak Looking at the SEDE query from the comment you quote, the comparable tags which jump out to me are riemann-hypothesis, collatz-conjecture, and goldbach-type-problems

The first two have no edit history on the tag description -- they were presumably written before MO joined the SE network

that last doesn't have a tag description at all.

All three should probably lead with "see our policies on open problem questions" or something.

I'm not sure what the canonical meta question on open problems is though.

Actually -- what does "goldbach-type problems" even mean?

Does it just mean "prime number-related additive combintaorics"?

Does it mean "longstanding famous open problems"?

Martin Sleziak

5:54 AM

@TimCampion So you probably want to add is:q, in order to restrict the search to questions.

Of course, that's only tangential here. (And most likely I am just repeating something you already know.)

Tim Campion

thanks, I didn't know that, actually!

Martin Sleziak

@TimCampion Im am not sure what you mean by "no edit history".

Tim Campion

When I look at the edit history, it has an edit from 2013 by "Community" and no other edits.

I assume that just means it was copied forward when we joined SE?

And no edit history was kept before then?

Martin Sleziak

I see that the tag-excerpt for riemann-hypothesis was created in October 2013 and the collatz-conjecture has tag excerpt created in December 2013: mathoverflow.net/posts/145895/revisions mathoverflow.net/posts/150739/revisions

Maybe you looked at the tag-wiki rather than the tag-excerpt?

Tim Campion

Yes, that's what I did.

Martin Sleziak

5:57 AM

You'll see the same thing for all tags which have the tag-excerpt and the tag-wiki is empty.

Tim Campion

That would do it!

Martin Sleziak

When a tag-excerpt is created, the tag-wiki is also automatically created. (But many times it remains empty.)

Tim Campion

In any event, it does not appear that the tag-excerpt in this case has seen much expert attention.

Martin Sleziak

In fact, sometimes you'll see an empty revision history on both - that's the case if there was a suggested edit to create one of them, but it was rejected.

I think there was such a case quite recently - I can try to find it if you want to see some example.

Tim Campion

I think that makes sense, don't worry about tracking it down.

Martin Sleziak

6:00 AM

@TimCampion Isn't that true about everything tag-related on MO? (At least since quid and Ricardo Andrade left.)

Apr 4 at 9:50, by Martin Sleziak

@MartinSleziak The suggested edit was rejected. However, even failed attempt to create the tag-excerpt should prevent the tag infinite-products from getting removed even if it has only one question. https://mathoverflow.net/posts/389122/revisions https://mathoverflow.net/posts/389121/revisions

Tim Campion

To be honest, I know very little about anything tag-related on MO!

Martin Sleziak

mathoverflow.net/review/suggested-edits/146734

Tim Campion

I'm not going to touch that one :)

Martin Sleziak

Yes, I just mentioned it as an example - the suggested edit was rejected, there was no other activity, so in this case you see empty revision history for both tag-excerpt and the tag-wiki.

Tim Campion

right

Martin Sleziak

6:03 AM

Sorry for digressing from the topic you started.

You probably wanted to discuss tags such as riemann-hypothesis, collatz-conjecture, and goldbach-type-problems - let's hope somebody will chime in.

Tim Campion

Is there precedent for having the tag excerpt mainly warning the user that if they're thinking of using the tag, they might want to rethink their question?

Martin Sleziak

I see that it's 2 am in Indiana. You stayed up quite late tonight.

Tim Campion

It's true :)

Martin Sleziak

@TimCampion Well, there were (or one could say there are) the deprecated tags.

Tim Campion

What's a good example?

Martin Sleziak

6:06 AM

You can get to the tag-wikis from the list of orphaned tag-wikis or from this post on meta.

> When I look at the tag excerpts, I see that information that the tag is deprecated was added in March 2016 for abstract-algebra, in February 2016 for discrete-mathematics and in June 2013 for geometry.

For example, the first one looked like this.

> Deprecated; do NOT use this tag. Instead you could consider gr.group-theory, ac.commutative-algebra, ra.rings-and-algebras, universal-algebra, or various more specific tags.

Ok, see you later and good night!

Tim Campion

Alright.

Yes, I should probably retire.

I did notice this interesting suggestion from Martin.

Martin Sleziak

@TimCampion It seems that CMs are not too willing to created tag-warnings. In any case, here on MO we do not even have suggestions from the community for some specific tag warning.

It seems that it is rather difficult to persuade a CM to create a tag warning. At least that's what I gather based on the response from a moderator when tag warnings were discussed on Mathematics. Let us hope that moderators will get the ability to add tag warnings and then the process will become a bit smoother. I have seen that the feature request about this is marked (status-review): Give moderators the power to add tag warnings. — Martin Jul 10 '20 at 9:47

in whatever, quid, Apr 21 '19 at 23:02, by quid

@MartinSleziak yes, but not too much came of it. Mostly a "it's not that useful anyway" (not an exact quote, but a paraphrase)

Tim Campion

good to know

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