12:48 AM
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Is tag applications for applications of mathematics to mathematics itself? applications of mathematics to other fields? applications of mathematics to any field? job applications? (e.g., Recommendations from supervisor to postdocs in mathematics) I ask this question because tag applications...

5 hours later…

7 hours later…
12:51 PM
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Please remove or replace tag-removed whenever you see it! This is the intended use of this non-tag! Per comments by Glorfindel and François above, it looks like this is impossible. (I'll accept this answer once I can to move this off the unanswered queue, and of course unaccept it if evidence to...

-1 from me since the current wording of this answer is not correct. It is not true that removal of a tag without bumping is impossible - as explained in several comments, it is possible but it has to be done by Stack Exchange staff. Some instances when this was actually done can be found on Mathematics Meta. (I will just add that this is only about whether or not this is technically possible - whether or not removal of this tag would be a good idea is a separate question.) — Martin Sleziak 2 mins ago
Some time ago I have summarized various tag-related actions in this post: What to do with the synonyms for the deprecated tags? Let me repeat this here:
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Recently, the following tag synonyms were created by a MathOveflow moderator: abstract-algebra $\to$ ra.rings-and-algebras, geometry $\to$ mg.metric-geometry and discrete-mathematics $\to$ co.combinatorics. You can see the new synonyms in the list of tag synonyms (Wayback Machine). The three tags...

> Since not everybody is familiar with tag-related actions, let me also briefly summarize some terminology.
> Tag synonym. A synonym (tag1) $\to$ (tag2) means that the tag (tag1) will be automatically replaced by (tag2) when added to question or when editing a question. And in many other aspects, (tag1) now behaves as (tag2). (For example, searching for (tag1) gives the posts with (tag2).) See also the FAQ post: What are tag synonyms and merged tags? How do they work?
> Merging two tags. Merging should be used carefully, since it is not a reversible process. If a tag (geometry) is merged into (mg.metric-geometry), that means that all instances of (geometry) are changed to (mg.metric-geometry). (Without bumping any questions.) The change is also made in the revision history. (So from the question it will no longer be visible which tag it had before merging.) ...
> ... There is a section "What are merged tags?" in the FAQ post: What are tag synonyms and merged tags? How do they work?
> Blacklisting a tag. Blacklisting prevents the tag from being added to new questions. (And, at the same time, if some question already has the blacklisted tag, it must be changed when the question is edited - an edit which still keeps the blacklisted tag cannot be saved.) ...
> ... I tried to explain the details concerning blacklisting in my previous post: The existing deprecated tags should be blacklisted. There is also a FAQ post: What is a blacklisted tag?
> Burnination means that all occurrences of the tag are removed from all questions which have the given tag. Again this is done without bumping any questions. Unlike merging, this cannot be done by mods, so a member of Stack Exchange staff has to be involved. See also: What does it mean to “burninate” a tag?

3 hours later…
3:43 PM
Maybe my previous comment was a bit harsh. (And I have now removed my downvote.) I will just repeat that burnination (complete removal of a tag is possible). But when this answer says "this is impossible" the word this probably refers to the second paragraph of the questions (i.e. "remove this tag from all positive-net-score questions with at least one additional tag") which is slightly different. (Probably I should have read the question a bit more carefully before voting and commenting.) — Martin Sleziak 29 secs ago