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Just when I thought I was out, they pull me back in
6h

comment 
Translation is continuous in measure space
Marjo, in your most recent edit you say that no one could solve the question. Did you find a mistake in the solution that I sent you by email? PS, if you put @ before a username when replying, then that user gets notified of your comment 
8h

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On existence of right units with control of their norms
my mistake, I misread your question as asking about right approximate units. I've deleted my previous comment. Sorry. 
1d

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Property of $\limsup$ in $\ell_1$
@user62498 if you are having difficulties with analysis at this level, MathOverflow is not the place to be asking your questions (and you probably need to revise whichever previous courses in analysis you have taken) 
1d

reviewed  Reject suggested edit on Forcing in Homotopy Type Theory 
1d

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Property of $\limsup$ in $\ell_1$
If GeraldEdgar's outline is not explicit enough for you: rewrite both sides in terms of the epsilondelta definitions of limits, and then see what exactly it is that you have to prove 
2d

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Removing an article from arxiv
I should also add that it seems very strange for a journal to refuse to consider a paper simply because a preprint has been put on arXiv. 
2d

reviewed  Close What does “group size” mean in the G option of directg in nauty? 
2d

reviewed  Close How to prove this equality in $\ell_1$ 
Jul 21 
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BMO spaces on the torus
Regarding Q2: it's been a long time since I did the relevant calculation, but I believe that (for n=2 say) if you take a square and subdivide into 4, then the mean oscillation over the big square is bounded above by the max of the mean oscillations on each subsquare. (The BMO condition is interested in behaviour on all sufficiently small scales, averaging on a coarser scale can only make things better) 
Jul 21 
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BMO spaces on the torus
[deleted a previous comment which was based on a misreading of the actual question] 
Jul 21 
reviewed  Close Can you overcome the 6th degree obstruction? 
Jul 21 
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Can you overcome the 6th degree obstruction?
This question appears to be offtopic because it is a lame joke 
Jul 21 
reviewed  Leave Closed book suggestion in fourier analysis and differential topology 
Jul 20 
reviewed  Leave Closed Derivatives of infinite order 
Jul 20 
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Negative impact of wrong or nonrigorous proofs
@DeaneYang Actually, as soon as I finished typing this I have thought of relatively recent examples which is closer to what I think you are asking about. A result was announced in a talk but has never been published, and it is now quoted and used in papers but no one has written out details or tried to extend the result in its natural directions. In a second instance, the result was announced, and some notes based on the talk were circulated as a quasipreprint, but a paper has not been published & I've heard that the claimed result may have been quitely retracted, while people are citing it 
Jul 20 
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Negative impact of wrong or nonrigorous proofs
@DeaneYang on reflection, my response was motivated more by cases where a big name proves a key case of a result, other people do work to extend to full generality and fill in the details, and only the big name gets mentioned by people who don't believe in the difference between primary and secondary sources 
Jul 20 
reviewed  Leave Open On groups satisfying a law 
Jul 20 
reviewed  Close About equivalent statements of the Birch and SwinnertonDyer Conjecture 
Jul 20 
reviewed  Close Theorems true but wrong. 
Jul 20 
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NonCommutative analog of the Poincare Bendixson theorem
My last comment on this thread: I think that a question where the questioner does not do their own work beforehand will usually not be a good question. 