There is a similar question: Should questions that are useful and relevant on Mathematics SE be copied across to Operations Research SE?
But mine is about questions that could go on Mathematics or MathOverflow. Robert Cartaino's answer to the previous question said "The purpose of creating this site is to expand the scope of questions which cannot already be asked elsewhere. Certainly some incidental overlap in scope is to be expected, but the goal of having your own site is to curate a collection of content unique to this community specifically; not to simply copy content from elsewhere."
In this case I'm not wondering about copying content from other sites, but if a question like:
Is there any base $b$ such that $\lceil \log_b (k)\rceil -1 \ne \lceil \log_b (k/b) \rceil$?
came up in an OR context and I asked it here, would it be nominated for closure or deletion because it can be asked on Mathematics or MathOverflow? What if I generally like the community here at OR more than at those places (it's a hypothetical question because I've actually never had a bad experience on Mathematics and I haven't ever even used MathOverflow!) and therefore wish to see what OR people's perspective on this question is, more than what the bigger "Math" communities have to say?