I recently asked and answered a question on the main site: What are the Energy eigenstates for a modified quantum harmonic oscillator?
First of all, this question ended up being re-tagged as homework, which I understand. While the question is not the sort of question addressed in even relatively advanced quantum mechanics books, it has a straightforward answer that requires a straightforward conceptual and mathematical explanation that could be addressed in a quantum mechanics class (although, in my experience, it absolutely never is). While I think that labeling this as homework is unhelpful (because it groups this question in with tutoring-style questions - the bane of this StackExchange) and unfair (since a lot of people who I think might appreciate the answer block the homework tag), I understand why it was done.
However, this question has a clear conceptual question built on an obvious hole the curriculum of standard physics textbooks: How can the series solution only converge if the series terminates? The answer, as I explain, is that that statement is simply misleading, and the actual solution goes entirely unaddressed in standard references.
I stated a clear conceptual question in my original post, and I then give a clear and complete solution to the conundrum in my answer.
So I am confused about two things:
(1) Why was my answer deleted? Is this a new standard that off-topic questions have their answers deleted? That seems wasteful and unhelpful.
(2) Why was my question marked as off-topic? I stated a clear conceptual question (i.e. how can a series solution converge without terminating if the references say that it doesn't), and I showed plenty of effort considering the detailed answer that I gave.
This seems like a perfectly legitimate Q&A-style question being unjustly swept into the homework trash heap. It seems clear to me that this question and answer is well-outside what the homework tag is meant to protect against, and I think its worth re-considering if this action against my question was genuinely justified or appropriate.