I have a question on Math.SE which hasn't received any responses. Is it alright to repost it to MathOverflow? If so, how long should I wait before doing so?
The fact that no one has come out and said it is inappropriate for MathOverflow probably means the community thinks it's alright for MO. Maybe give it another day before posting here. It might be good to refer to this meta discussion; I'd be happy to give it a vote of support (perhaps it's not "research-level", but it's the kind of graduate-level question that would have been happily entertained at various points in the history of MO).