26

I am profoundly opposed to the "cargo cult" question. The internet is full of places where one can indulge in the pleasures of righteous indignation by mocking the failings of others. I absolutely do not want Mathoverflow to join that sorry list. People who agree with me have every right to vote for re-closure, as many times as necessary, and I hope that ...

answered Jun 26 '18 at 13:30

Neil Strickland

46.8k22 gold badges2121 silver badges2626 bronze badges

19

[RE-OPENED and later CLOSED again]
The question How the idea of adjoint matrix has been designed? isn't great, but isn't awful, and these two answers have been posted (and upvoted) on G+ rather than as answers, which is dumb. Let's reopen the question so that the answers can be added.
As an aside, the fact that Allen Knutson basically said "this is going ...

10

[REOPENED]
Why was User retention rates on MathOverflow closed (on meta)? It's not a great question, I agree, but it's not exactly off-topic on meta to ask about user retention rates on the main site, and explanations for observed statistics.

10

At various times in the past 9 years or so, we have tried several different social conventions to resolve the dissatisfaction that arises with the existing opening and closing rules. This may not be a comprehensive list:
Person X with at least 3000 points would comment, "I vote to keep open", so that Person Y with at least 3000 points who wanted to close ...

8

[REOPENED]
I find nothing wrong with Linear Algebra Text Book. Certainly MO.1 entertained plenty of questions about pedagogy without any controversy, and the selection of a linear algebra book with a view toward proof and standards of rigor is a perennial issue for teachers of undergraduate mathematics.

8

[REOPENED]
The question A normal distribution inequality was originally phrased in a way that sounded like an exercise, and rapidly got downvoted and closed. I'm not a probabilist, bun in its current form it looks like it could be a genuine question worth re-opening.

8

[RE-OPENED]
I believe the post Can you write $\mathbb R^2$ as a disjoint union of two totally disconnected sets? has been closed (or put "on hold") erroneously, as a duplicate of Can you explicitly write $\mathbb{R}^2$ as a disjoint union of two totally path disconnected sets?
Certainly the question is different; note that the consensus to the first ...

8

One can always flag a question for moderator attention, use the flag to point out to the moderators that an open/close war is in progress, and ask for moderator intervention. In my (limited) experience, moderators will wait a while to see whether things settle down of their own accord, but will take some action if it gets to the point where they reckon ...

8

For the reasons that others have described, I think that the existence of this question is damaging to MO. There have already been nasty speculations in the comments threads about the characters of various people. I have thus not only (previously) voted to close it, but I have also voted to delete the question. I urge others to do likewise.

7

It's generally a complete disaster when someone asks a question, has it answered via an trivial comment, and then changes the question to the question 'they really wanted to ask'.
To anyone coming along later, it's near impossible to understand what's going on. It's nearly always best, if your initial question turns out to be broken in some way, to say ...

6

[REOPENED]
Derek Holt, a highly respected researcher in group theory, wonders aloud why A subgroup intersects conjugacy class of every prime power order element was closed. I don't understand the closure or downvotes myself.

6

[REOPENED]
The OP of this question Connected sum is well-defined for surfaces, proof? requests reconsideration to reopen.
It was closed as a duplicate, but OP says that what is asked for was not answered at the other post; he/she wants a simple self-contained proof that doesn't invoke anything so powerful as the Annulus Theorem. OP believes that for the 2-...

6

Fixed in next build, watch for rev DATE.1177.

5

The question
A question on $p$-approximation property from 2014 has been automatically deleted owing to lack of upvotes. While I can't immediately tell if it is a good question, it seems a perfectly reasonable one, which is unlikely to attract bad or vague answers, and might eventually get a proper answer.
For those who have high enough rep to see the ...

5

[REOPENED]
I'd like to nominate this question. It originally got closed due to a typo, which has been fixed. It's certainly not "unclear what you are asking" any more (the original reason for closing), and it looks like a perfectly reasonable question to me.
I have a (rather quick) answer ready, and it's mildly frustrating not to be able to post it.

5

[RE-OPENED]
I think that the question How does a mathematician choose on which problem to work? was too broad in its original formulation (beginning: "How does mathematical research work?") and so I have revised it in a way that I hope allows it, as a soft-question, to be (re)re-opened. It is certainly not intended as a finalized product; only a more ...

5

[REOPENED]
This question was heavily downvoted and closed: When a compact topological manifold with boundary is a ball? Color me ignorant, perhaps, but I wondered if it were as trivial as the downvotes and closure might suggest.
Although it is a question for the topological category, a very similar question but for the smooth category was upvoted and ...

5

[REOPENED]
Parameterizing rotations of a cube
was asked and answered, but I don't see a reason for closing it.

5

[UNDELETED]
This is an undelete request for an answer on meta: namely, quid's answer to my question Some proposals for modifications of the process of closing/reopening questions . The answer was accepted, but yet got deleted when quid left the site. This was not quid's intent, and I also checked that quid was fine with the answer being undeleted (see ...

5

[REOPENED]
I'd like to suggest reopening Covering systems. As I wrote in a comment,
Why is this closed? Covering systems are a recognized area of research in Number Theory. It's known that in an irredundant cover with a modulus divisible by a prime $p$
there are at least $p$
moduli divisible by $p$. This asks whether, if there is a modulus divisible by ...

4

[REOPENED]
"Find a TSP tour passing through at least one node in each set of nodes" was initially unclear, but the author
has now clarified it into a real question (and I corrected the English):
Is there a PTAS (polynomial-time approximation scheme) for this problem?

4

The question How to find generators to Mordell weil groups of elliptic curves? was originally phrased in the narrow context of inquiring just about the software Sage. I had voted to close that, but the revised more general question seems worth reopening. I have cast my vote to reopen, but am not sure that the revised question has received enough attention. ...

4

[REOPENED]
I think this question:Are there infinitely many natural numbers not covered by one of these 7 polynomials? should be reopened. Please see the comments by me and Joel in main.

4

[REOPENED]
The question
Finding all local maximum points of a function?
does not seem as trivial to me as has been supposed. Sure, one can set the gradient equal to zero, but how does one actually prove that the only solutions are the "obvious ones"? At the very least it seems worth leaving the question open for a while.

4

[REOPENED]
I think people were pretty hasty in shutting down this question: Shape of axioms in abstract algebra. I could just barely squeeze in some highly relevant content and context in a comment before the thing was shut down. I request that this be reopened.

4

A couple of questions about Turing machines that are bounded in space but have an infinite amount of time in which to operate.
I think some votes to close here were due confusion related to an earlier version of the question where the OP experienced technical difficulties. The objection that the OP's SBTMs are finite state machines is incorrect. Moreover, ...

4

[REOPENED]
The question Lexicographic order on increasing $k$-tuples by a first-time poster was closed as "unclear what you're asking". I have rewritten it so that (I think) it is now clear. It is not a hard question, but I think it probably has a nice answer.

4

[REOPENED]
The question Identify one group of linear transformations was closed as "unclear what you're asking". Afterwards it has been edited and clarified. I don't see what is still "unclear" in this question.

4

[UNDELETED] [REOPENED] [CLOSED]
I would suggest to undelete/reopen https://mathoverflow.net/q/328312, as a courtesy and sign of respect, and then hopefully one of our experts can answer it.
I know, I was one of those who cast a vote to delete, when I was still under the impression that this was posted under a false name. Somehow the software allows to ...

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