I've seen many related questions including:
- Best way of asking "check my proof" questions
- What to do with a "check/simplify my proof" type question?
- What Do We Do About Comment-Answered Questions?
- Should we encourage proof verification questions to turn into self answered questions?
- How to answer proof-verification questions?
But I think few users are following any of the better ways to ask or answer proof verification questions, and it is still continually generating tons of unanswered questions that will never get answered. I also don't think it makes sense to expect people to write up community wiki answers to such questions, since the asker has already been completely satisfied with the answer given in the comments, and often there is little more to say. I'd submit that Math SE is bound to have this issue much more than other SE sites, and so perhaps it would be really helpful to have a closing reason dedicated to this:
This proof-verification question has been satisfactorily answered in the comments.
This would allow us to close a large number of such questions effectively and clear up the unanswered questions list significantly. Such has been suggested before but nothing concrete has come out of it yet. I think it is clear that time spent writing up answers would be better spent giving good answers to other questions than just to make such questions answered.
It appears that I may have given a slightly wrong impression. I do not advocate actively seeking out such questions to close them, but rather it is intended to be a passive measure whereby users who finish reading a question and find it answered satisfactorily in the comments can immediately close the question so that other users who are not interested in these localized questions will not waste their time. Even as a passive measure I am sure that it would be an efficient mechanism to settle questions that no longer need an answer.