4:45 AM
abstract-algebra with 299 questions, 167 if we omit the most frequent algebra-related top-level tags and 90 questions with no top-level tags.
geometry with 375 questions, 225 if we omit frequent geometry-related top-level tags and 128 with no top-level tags at all.
discrete-mathematics 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 abstract-algebra was removed, 749 questions where geometry was removed 85 questions where discrete-mathematics 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.
top-level-tags 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).
top-level-tags 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 discrete-mathematics and continuity.
At the moment, there are only a few question where the tag continuity has been removed: data.stackexchange.com/mathoverflow/revision/1038474/1282557/… data.stackexchange.com/mathoverflow/revision/1038477/1282560/…
57

From 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, name-of-tag). Is there a way to have a similar shortcut that creates a link to a tag on the meta site?
7:59 AM
Here is a similar question on Mathematics Meta: How to use
[tag:tag-name]
for tags of the meta site?
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
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.)
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