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4:45 AM
Two years ago were 1000 questions with deprecated tags.
One year ago it was 884, now there are 830 questions with deprecated tags.
You can also compare this with numbers from June 2, May 1, March 3, November 27.
with 299 questions, 167 if we omit the most frequent algebra-related top-level tags and 90 questions with no top-level tags.
This tag was at 300 questions on July 25.
with 375 questions, 225 if we omit frequent geometry-related top-level tags and 128 with no top-level tags at all.
contains 157 questions, 74 if we omit co.combinatorics, 37 with no top-level tag at all.
Also deprecating of (convexity) was discussed on meta. It was also suggested to deprecate (continuity).
The are 182 questions where was removed, 749 questions where was removed 85 questions where was removed.
You can find queries returning those posts here: chat.stackexchange.com/transcript/message/49179918#49179918 You can even check which users have edited them away: chat.stackexchange.com/transcript/10243/2019/4/28
As I have mentioned before, it would be not difficult to prevent deprecated tags at least from being added to new questions: The existing deprecated tags should be blacklisted and Blacklisting (deprecated) tag while they still exist.
There are 103129 questions on the site, 82310 questions with a top-level tag, 87384 questions if we also count (linear-algebra), (graph-theory) and (set-theory).
22.019% of questions without top-level tags, 17.212% of questions if we take the less strict interpretation.
Here are the links used to find the posts with top-level tags: chat.stackexchange.com/transcript/10243/2018/10/27
 
 
2 hours later…
7:16 AM
@MartinSleziak YCor edited the tags on this question, he removed both and .
There are 96 question tagged .
57
Q: When has discrete understanding preceded continuous?

Joseph O'RourkeFrom my limited perspective, it appears that the understanding of a mathematical phenomenon has usually been achieved, historically, in a continuous setting before it was fully explored in a discrete setting. An example I have in mind is the relatively recent activity in discrete differential geo...

 
When typing a post on main or on meta, the text "[tag:name-of-tag]" creates a link to the tag named "name-of-tag" on the main site (for example, ). Is there a way to have a similar shortcut that creates a link to a tag on the meta site?
I found the answer: "[meta-tag:name-of-tag]" ()
 
7:59 AM
BTW this is also mentioned in Markdown help in the section Tags.
As there were only two questions tagged markdown+tagging, it was not that difficult to find it. (However, if I did not remember that something like this has been asked on that particular meta, I am not sure whether I would try to search at all.)
On Meta Stack Exchange: Is there some markup to post tags? However, there were more posts tagged markdown+tags on that site.
 
 
2 hours later…
10:25 AM
It is not very surprising that you can find examples of such syntax in chatrooms related to tagging - such as this one. Example with a tag on main: chat.stackexchange.com/messages/51468140/history Example of a tag on meta: chat.stackexchange.com/messages/50792773/history
Although I see that I recently linked by mistake to main-site tag, when I mean a tag on meta: chat.stackexchange.com/transcript/10243?m=51393232#51393232
In case it is useful in this context: How to view/copy source of a message in chat?
 
 
2 hours later…
12:11 PM
@MartinSleziak Now I have noticed that the Markdown help on main only mentions [tag:name] while the syntax for tags on meta is mentioned in the editing help on meta. (So I should have linked to meta and not to main.)
I have forgotten about this difference. (Although some time ago I have mentioned it in my answer.)
 

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