I feel that this is a trivia question, not a mathematics question, and (more subjective) a rather uninteresting piece of trivia. I do not think it belongs on the site, but I am interested in other opinions before casting a vote.
@MikeMiller @AlexFrancisco OP is giving this example.
In this comment.
If people want to close this, note I'm really looking for a thread like this which maybe can be opened: "examples of challenging differential equations where the final answer is an elementary function", something along the lines of this post that has 73 upvotes and brought good discussion: "An example of a problem which is difficult but is made easier when a diagram is drawn": math.stackexchange.com/questions/1100090/… — Presh2 hours ago
I don't see a problem with a "miraculous cancellation in PDE" question, though it runs the risk of being far too broad. But then most of the question as stated is a non sequitur.
@paulplusx Actually I found both questions mentioned insipid since neither is about how to solve a specific problem but about collecting and exhibiting some special (?) problems. However, this is a Q&A site instead of a repository for such questions.
@XanderHenderson That can't be right; if we were really trusted users we should be able to delete without even closing. Of course, we aren't completely trusted, and hence the restriction/delay.
@XanderHenderson In any case, I don't have a problem with this restriction. What I do have a problem with is the restriction that experts cannot delete an answer until it has negative score. That is really ridiculous.
This question does not appear to be about Mathematics Stack Exchange or the software that powers the Stack Exchange network within the scope defined in the help center, perhaps?
