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The judgment of whether a question is considered on-topic or not for MO is made by individual MO users. If a question is closed but other users disagree with the reasons for closure, the latter may cast votes to reopen. But there is no blanket answer to your first question. The individuals who voted to close may or may not give their explicit reasons. You ...


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It makes sense to talk about the core communities of each forum, so that it becomes easier to understand the scope and the differences. Not being active on the mathematics forum, I will give my belief, which hopefully matches the intent, of the community for that forum. MathOverflow has a community of professional mathematicians employed in academia and ...


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Another user suggested that I should advertise this question in MO also, so here comes. It is just a number theoretic curiosity spawned by an earlier question where small cases were handled by a computer search, asking whether to a given $t$ we can find a $k$ such that $(k!)^2\mid (2k-t)!$. I will try and collect interesting stuff on Math.SE to the Pearl ...


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I like to have valuable opinions of the MO community members on following well received question of mine : https://math.stackexchange.com/q/3570663/702232 I'm working on it with very slow rate of progress. The question is deleted and then I'm banned on MO after I asked the above question on MO earlier ( it's first asked on MSE then after sometime with no ...


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I posted this question on math.SE and it has not been answered. I thought I should move it to MO. But I read this and I decided to follow Asaf Karagila's suggestion, so I am posting my question here. There is a theorem by Poincaré and Hurwitz which says, basically, that an elliptic $\mathbb{Q}$-curve with positive rank has infinitely many points in every ...


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