I'd like to update my poor knowledge about the policy of this site:
The hints, which are usually very short answers, have become unwanted (as answers, I mean)?
I'm asking this since my my answer was turned into a comment by the moderator Alexander Gruber. As one can see, the answer had one upvote and helped the OP to post his own answer. So why delete it?
This meta post is tagged "specific answer", so I'll frame my remarks accordingly.
The posting of very short "hint" answers has come up a few dozen times here, for example "Is it acceptable to leave hints as answers?" and its linked posts.
The present case was this text:
Hint. Consider $\frac{1}{s}\in R_S$.
The Question Exercise about localization and monic polynomial to which this responds is about proving $R = R_S$ when $R$ is an integral domain, $S$ a multiplicative subset, and every element of the localization $R_S$ is integral (satisfies a monic polynomial) over $R$. The body of the Question includes de minimis context, namely the application of the hypothesis to a typical element $r/s \in R_S$
So your hint might be understood by the user-who-asked that it suffices to consider just the case $1/s \in R_S$. This hint evidently was useful as the user subsequently (within the day) posted a self-answer (one that you edited lightly for grammar, etc.).
I also consider the self-answer as evidence that your hint did not answer the Question. In such cases deleting the Answer and reposting it as a Comment is a possible moderator action. I have flagged such posts for moderator attention (in the past, not in this case) with a request that it be changed to a Comment.
Given your long participation on the site, it is possible that this policy is known to you. Perhaps you even intend to test the boundaries of brevity by posting this way.
In some cases the rush to post a "hint" as an Answer doesn't succeed in producing a viable approach. You recently posted such a failure regarding "Isomorphism between two field extensions":
Hint. Notice that $f(x+1)=g(x)$.
I've often left a Comment (where a "hint" ought to be expanded to at least a sketch of the solution) to "be wary of posting an Answer that is significantly shorter than the Question" to which it responds. The wariness I recommend to posters of "hint" Answers is intended to benefit you as well as the Community. Our mission is to collect and curate content useful to learners of math at all levels, so even when a hint is useful to the original poster, fuller explanations can have greater value to future Readers.
Instead of an answer to my question I got this:
Hello,
We're writing in reference to your Mathematics Stack Exchange account:
https://math.stackexchange.com/users/121097/user26857
Moderation on this site is not perfect, we know. We, the moderators, are far from perfect, we also know that. Sometimes we make decisions that you may disagree with, sometimes we are wrong, and sometimes we just can't reveal the whole picture because of user privacy rules.
It is true that when you disagree with the actions of moderators, complaining on meta is the right way to go (another route is to contact SE directly and file a complaint with them). Having said that, your meta post Short answer turned into a comment by moderator is absolutely not the way to complain about moderation.
Getting angry is natural, venting your anger is reasonable, but aiming it, publicly, at the moderators is absolutely unacceptable.
Your account has been temporarily suspended for 15 days. While you’re suspended, your reputation will show as 1 but will be restored once the suspension ends.
Regards, Mathematics Stack Exchange Moderation Team
If the moderators felt offended by my post why don't delete it and eventually send me a warning?
Well, when you have the suspension tool at hand maybe it's easier to do things like this.
Let me say that I also felt offended by the way you proceeded, and by your constant disrespect for high rated users who dare to question your methods.
