# All Questions

485
questions with no upvoted or accepted answers

11
votes

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answers

544
views

### Appropriateness of proposed question on applications of number theory in dynamical systems?

Update: the question has now been asked on the main site - Applications of number theory in dynamical systems
I am considering asking a reference-request type question on MO about significant and/or ...

11
votes

0
answers

558
views

### Primarily opinion-based questions/answers

One closing option is primarily opinion-based: Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on ...

11
votes

0
answers

348
views

### One more reason to reject an edit: too much alteration

I encountered this now, and have seen it quite frequently before: I would like to reject an edit, and the reason is something between "attempt to reply" and "clearly conflicts with author's intent". ...

11
votes

0
answers

591
views

### Learn from my mistake

The question "What is the spin connection in 9 dimensions as opposed to 5 dimensions?" received two down votes. I would like to know what I can do to improve the quality of this question. Thank you ...

11
votes

0
answers

260
views

### Quick or easy methods to post math or diagrams on chat

One of the seeming obstacles to having scheduled informal seminars on chat is the extra work, probably mostly for the leader of the discussion (should there be one), in presenting ideas on the chat ...

11
votes

0
answers

143
views

### MathJax in suggested edits

Pages like
https://mathoverflow.net/review/suggested-edits/1435
display suggested edits for review. The original and edited versions are displayed in parallel columns with the differences highlighted....

11
votes

1
answer

302
views

### "2 views" hardly different that "2 kviews"

In the old version of MO, the header of a question was accompanied by a graphic information (this is an example): a huge "2" or "2k" and a tiny "views". Now we see Huge "2" and tiny "views" or "kviews"...

10
votes

0
answers

557
views

### Rationale for reputation change on "my" reputation page that says 'User was removed'

At MathOverflow > Help center > Reputation & Moderation I see the following:
[...] a user who voted for one of your posts had their account deleted (either by request or due to violating ...

10
votes

0
answers

545
views

### Bounty awarded to an immediately deleted answer

Something peculiar has just happened. A week ago a 300 point bounty has been added to this question (I think its content is hardly relevant to this meta question) [note: the bounty was added by a user ...

10
votes

0
answers

317
views

### What should you do if you find old duplicates?

Sometimes I discover that "old" MO questions are duplicates of even older MO questions.
Two examples:
Embarrassingly, I found out that my own question: Formula for number of permutations ...

10
votes

0
answers

353
views

### What to do with the synonyms for the deprecated tags?

Recently, the following tag synonyms were created by a MathOveflow moderator: abstract-algebra $\to$ ra.rings-and-algebras, geometry $\to$ mg.metric-geometry and discrete-mathematics $\to$ co....

10
votes

0
answers

700
views

### 2018: a year in moderation

Good morning, all! I'm a Community Manager here at Stack Exchange; some of you might remember me from classic answers such as a temporary change now approaching 6 years live and a list of possibly ...

10
votes

0
answers

590
views

### Question mysteriously deleted

I answered a question earlier today. It asked something like for an element $g$ of a free group, does there exist a finite-index subgroup of the free group such that g is a basis element of the ...

10
votes

0
answers

568
views

### Probability question migrated to stats.stackexchange

What has happened to the following question?: https://mathoverflow.net/posts/202242/revisions
Firstly, it looks like a reasonable question to me (although the notation could be improved). Why was it ...

10
votes

0
answers

414
views

### Is it appropriate to post question asking to prove NP-completness of more than one problem?

I believe that I discovered a method to generate several NP-complete problems. The NP-completeness proof is not immediately apparent to me. I did not find any reference in complexity literature to my ...

10
votes

0
answers

997
views

### Extending questions and answers gradually

If someone answers my question and I want to generalize it, how should I do it? Is it ok to gradually extend my question as answers improve? An answer to a question I wanted to ask may show me that I ...

10
votes

0
answers

376
views

### Area 51 Proposal: Sage and its subcomponents

I proposed a Q&A site for Sage and all its subcomponents viz. GAP, Pari, Singular, Sympy, ... on Area51 here. I thought many mathematicians here who use Sage in their research and teaching here ...

10
votes

0
answers

471
views

### searching mathematical formulae like in Zentralblatt Math

It would be nice if searching mathematical formulae like Zentralblatt Math http://zbmath.org/formulae/ could be implemented.

10
votes

0
answers

176
views

### Enabling MathJax over https

MathOverflow (and indeed all the StackExchange sites) support https connections. However MathJax is currently broken, because the default server for the MathJax distribution doesn't support https.
...

10
votes

0
answers

262
views

### When reviewing suggested edits, cancel rejection and approval votes

I have seen many edit suggestions approved which I consider to be minor edits to old posts (which bump them to the front page), or to actually reduce the quality or readability of the post. Other ...

10
votes

0
answers

185
views

### Wrong message for closing questions as off-topic

I was just reviewing the queue for closing votes, and I noticed that the message displayed in the options for closing as off-topic was:
off-topic because...
This question does not appear to be ...

10
votes

0
answers

588
views

### On "How does the work of a pure mathematician impact society?"

The question How does the work of a pure mathematician impact society? was originally quickly closed, relatively quickly reopened, after a longer time closed again and has at the time of this edit a ...

10
votes

1
answer

321
views

### Remove the user-identifying part of the "share" URL

When you click the 'share' button beneath a post on MathOverflow, a box pops up containing a short URL for the post, e.g. of the form
...

9
votes

0
answers

210
views

### 2023: a year in moderation

It’s that time of the year again! As we wave goodbye to last year and welcome the new one, we have a tradition of sharing moderation stats for the preceding calendar year.
As most of you here might be ...

9
votes

0
answers

289
views

### New tag for "stochastic partial differential equations" (SPDEs)

Since there are separate tags for a) ODEs, ca.classical-analysis-and-odes and differential-equations and for b) ap.analysis-of-pdes but only one tag for stochastic-differential-equations, I was ...

9
votes

0
answers

310
views

### Why are there two separate tags (open-problem) and (open-problems)?

I assume that most likely this was just an oversight - but since it was a result of a moderator's action, it is probably better to ask than just remove the tag singlehandedly.1
Question: At the moment ...

9
votes

0
answers

83
views

### Feature request: question title should appear above question preview

Just a minor niggle - when I'm reviewing my question, one of the things I want to review is the title. It would be nice if the title appeared just above the preview of my question, so I could review ...

9
votes

0
answers

351
views

### Suggested tag: approximation-property

I'm relatively new to MO (but have been on MSE for a longer time), which means that I don't have enough reputation to create new tags. Which is probably a good thing.
Lately I've been puzzling with ...

9
votes

0
answers

283
views

### Mathjax CDN is shutting down effective April 30th 2017

If you haven't seen the official announcement yet, Mathjax is shutting down their CDN effective April 30th 2017. We are currently looking for alternatives for hosting this service including self ...

9
votes

0
answers

236
views

### Should delete votes add a post to the low quality posts review queue?

Presently, unlike "Very Low Quality" flags, delete votes do not add
a post to the "Low Quality Posts" review queue. -- Should they?

9
votes

0
answers

822
views

### Probable Homework

This post asks for the solution of a problem subject to various artificial constraints of the sort that frequently arise in homework problems. When asked repeatedly why he wants to impose these ...

9
votes

0
answers

281
views

### Is this question appropriate for MO? (Instability of Newton basins of polynomials at multiple roots)

About a year ago I asked on MO when a Newton basin fractal is continuously determined by the roots of its polynomial. I mentioned in that question that I had convinced myself that the roots of the ...

9
votes

0
answers

507
views

### Questions on Mathematical Writing

Where should I ask about how to approach Mathematical paper writing? For example, the question [How to write an abstract for a math paper? ] was put on hold? Which stack exchange site should I have ...

9
votes

0
answers

704
views

### Why this is off-topic?

I posted a question on MSE for two months and received no helpful answer. So I tried the same question on MO. I got 4 off-topic votes and so the question got migrated back to MSE. I'd like to mention ...

9
votes

0
answers

639
views

### Why was the question about "expected difference of random variables" put on hold?

As I explained in the answer to the question The metric of the expected difference of random variables, I don't see any reason for closing it other than simple misunderstanding (to put it mildly) on ...

9
votes

0
answers

595
views

### The Math Teaching Stackexchange proposal is registering 38 more users for a private beta

Edit: Thanks to everyone who has signed up. There are already 162 participants, a number which usually takes several months to acheive.
As mentioned in this post, there is a proposal on Area51 for a ...

9
votes

0
answers

77
views

### Tag suggestions on ask page

The ask page tag input box currently looks like this:
The old ask page on MO 1.0 had a much more detailed description of what top-level tags on MO are:
Since appropriate tagging on MO can be ...

9
votes

0
answers

485
views

### Is this question appropriate? (Counterexamples in Universal Algebra)

I have a question which I'd like to ask, but I'm not sure it's appropriate for MO, and I wanted to get some feedback.
The reasons I'm worried it might be inappropriate are: (1) there are already ...

9
votes

0
answers

242
views

### Where is the off switch for the concurrent preview now?

I feel like an idiot but I cannot find it. Meanwhile, if the post is long and has a lot of LaTeX formulae in it, and the connection is imperfect, the wysiwyg regime is a non-stop fight. I figured out ...

9
votes

0
answers

654
views

### Collatz Question

I voted to close this question about a "5n+1" version of the Collatz conjecture because it appears to be entirely unmotivated, with no heuristics and not even any substantial numerical evidence.
I ...

8
votes

0
answers

78
views

### Dialog for closure misleading when question has been closed and re-opened

I noticed, when clicking "close" on this question: Breakthroughs in mathematics in 2023, that when a question has been closed and re-opened, and you voted to close it previously, the dialog ...

8
votes

0
answers

727
views

### Is this an AI bot? Can't tell if answer is from a real person

This question of Baez is getting a string of strange answers. I can't tell if the author is a mathematician, but their answers don't make much sense to me.
Which finite abelian groups aren't ...

8
votes

0
answers

379
views

### Will the closure of Gfycat affect MO?

Gfycat is a hosting service for (animated) GIF files, which will close on September 1st, 2023. Since some MO users might have included GIF files hosted on Gfycat in their posts, does the service's ...

8
votes

0
answers

337
views

### 2022: a year in moderation

As we say goodbye to the old year and welcome the new one, we have a tradition of sharing moderation stats for the preceding calendar year.
As most of you here are aware, sites on the Stack Exchange ...

8
votes

0
answers

125
views

### Some but not all LaTeX rendering correctly on tools page

Users with sufficiently high reputation have access to a "tools" page, which I like a lot. However, sometimes I find that the $\rm\TeX$ doesn't render properly. What is particularly puzzling ...

8
votes

0
answers

603
views

### What happened to the fonts?

It appears that MO (including MO Meta) has recently changed the display fonts:
I couldn't find any topics on MO Meta pertaining to this new change, hence this question. SO has also switched the fonts,...

8
votes

0
answers

849
views

### 2021 Community Moderator Election

The 2021 Community Moderator Election is now underway!
Community moderator elections have three phases:
Nomination phase
Primary phase
Election phase
Most elections take between two and three weeks, ...

8
votes

0
answers

550
views

### Is there such thing as "typical user reputation curve"?

This question is driven by sheer curiosity - maybe even vanity?
My reputation curve acquired curious shape lately:
I can even guess reasons (mostly personal) why the pace is so slow ever after June ...

8
votes

0
answers

188
views

### Icon for citation helper

On the main MathOverflow site (and also on math.stackexchange) the icon for the citation helper, which used to look as below, has recently confusingly changed to a "B", identical to the icon at the ...

8
votes

0
answers

375
views

### MathOverflow in the news

What are some instances of MathOverflow being mentioned in the media?
Now that MathOverflow has recently had its tenth anniversary, I would be interested to learn of any mentions of it in the mass ...