Is it a good idea to reopen this question? I really can not get a complete answer from some comments on (the final version) of the question.

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    $\begingroup$ What is your exact question here? The question in the title and the one below it seem quite different, and I'm not sure what you want to know. The fact that your question was closed suggests that the answer to the second question is "yes". $\endgroup$ Oct 27, 2014 at 20:15
  • $\begingroup$ @JoonasIlmavirta it depends on the opinion of various participants not just 5 people who voted to close. My question is that "is not a good idea to reopen this question? $\endgroup$ Oct 27, 2014 at 20:19
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    $\begingroup$ I see. I suggest editing that to the body of your question, so that it is clear what kind of answers you are looking for. Asking whether or not a closed question is worth reopening sounds reasonable to me, but I first thought you meant something else. $\endgroup$ Oct 27, 2014 at 20:26
  • $\begingroup$ @JoonasIlmavirta I also add that, according to some comments to this question which count this question as an exercise Iwould like to ask "was it realy a simple exercise? $\endgroup$ Oct 27, 2014 at 20:26
  • $\begingroup$ @JoonasIlmavirta Now I understand what you mean. thanks $\endgroup$ Oct 27, 2014 at 20:27
  • $\begingroup$ @JoonasIlmavirta I edited it. thanks again. $\endgroup$ Oct 27, 2014 at 20:30

1 Answer 1


It's generally a complete disaster when someone asks a question, has it answered via an trivial comment, and then changes the question to the question 'they really wanted to ask'.

To anyone coming along later, it's near impossible to understand what's going on. It's nearly always best, if your initial question turns out to be broken in some way, to say thanks, and post an entirely new question (hopefully with at least a comment below it explaining that this is the question you really meant to ask all along, with a link, and explanation, of the previous broken question).

(The automatically added notice on closed questions, encouraging you to edit if possible, is basically unhelpful and inappropriate on MathOverflow.)

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    $\begingroup$ Well -- I think this depends on the particular case. Posting a new question just because one has forgotten to exclude some trivial case seems not reasonable to me -- in that case I think it is best to fix the question and the commenter who has highlighted the omission removes their now outdated comment. $\endgroup$
    – Stefan Kohl Mod
    Oct 27, 2014 at 23:38
  • $\begingroup$ I think the record of the process should be made visible, with acknowledgment of refining comments. Even if the first question was poor, it often is what occurs in initial approaches to a topic; the refining comments help steer a newcomer in the right direction, especially when the newcomer has arrived late to the party. $\endgroup$ Oct 28, 2014 at 4:57

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