# All Questions

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118 views

### A recent question about connections

I think that the history of this question about connections is unfortunate. I would like to discuss (respectfully, without throwing blame around) whether/how a better outcome might have been achieved....
37 views

### Don't know the details to my old account, how can I find them?

My question is pretty much as in the title. I have an old account but no longer know which e-mail I used to set it up (never mind the password xD). Is there any way I can get the e-mail? I'm ...
119 views

### What if I'm not sure about what area of math a problem lies?

One student asked me how to solve a problem and the only way of solving it that came to me seems hopeless to find an answers. It occurred to me that I may using a wrong approach to it. How could I ask ...
42 views

### find an uncontinuous function [closed]

Is this statement true or false? why? Every real function bounded continuous on R is continuously uniform. I have an example but I'm not sure; f=x/(x+1) that is bounded and continuous Thanks from your ...
85 views

### Is this partial differential equation on topic for Mathoverflow?

I came across this differential equation. I'm not sure if it's research level, but I think it might be: u\frac{\partial}{\partial u}\left(u\frac{\partial f}{\partial u}\right) + v\frac{\partial}{\...
957 views

### Why is the question about SO(4) embedding into SU(3) attracting so many troll answers

This question: Is SO(4) a subgroup of SU(3)? has already attracted 5 rude spam answers (most of which have been deleted by the time I posted this, but if you have enough reputation you can see them). ...
204 views

### How do I recover my MathOverflow account?

I've been inactive for close to a year due to illness--and want to resume my activity as in Euclidean volume of the unit ball of matrices under the matrix norm but when I try to do so, I get treated ...
379 views

### Two traffic observations and questions

The MathOverflow traffic (page views, visits, new visits) shows steady and possibly increasing activity over the last $2+$ yrs. The chart below runs from 2019-Jul-07 on the left and 2021-Nov-04 on the ...
70 views

### Braces are not rendered in MathJax in the preview of a question

I am using Firefox 94.0.1, with no user scripts. I have a few add-ons, which I can list if needed, but, since the behaviour does not always occur, they cannot always be interfering. My renderer is <...
202 views

### "overestimates topoi" and research level

I wonder now and then, why this question is still open Did Grothendieck overestimate topoi? Usually, MO's members tend to be very strict about what is and what isn't a good question. But why is this ...
297 views

I found a very neat way to speed up MathJax execution times and I thought about sharing it with everyone here. Typically whenever I start my browser I have to load up all of these MathJax resources ...
183 views

### Why I am not allowed to answer protected questions?

I'm a new user of MathOverflow. In the privileges section, it says that I can now answer protected question. But in reality, when I visited this protected question, it says: I'm not counting the ...
577 views

### To which extent can one modify another's question?

One highly off-topic question of real analysis was asked in the main site by a new user. One user sent, 1 hour later, a long answer going far beyond the the question, and then, 12 hours later, edited ...
135 views

I had already asked a question as follows: "Is there a one dimensional foliation of a two dimensional manifold whose foliation groupoid is diffeomorphic to a 3 sphere with two north pole. The ...
200 views

### Finding previously highly active deleted users

I was fairly active on MO at the start. Then, as is the case with some early users, my participation became much more sporadic over the years. Recently, I realized that quite a few of the old accounts ...
287 views

### Criteria for Top question?

I posed a question on Mathoverflow which got no votes, but it made it to Top question. I supplied an answer, while nobody else proposed an answer. How come it made it to Top question?
165 views

### How to find out why a post was deleted

It would help to know why a post was deleted, I believe in this case automatically by a MO monitoring robot. I am not judging the decision, but would like to know why, to avoid asking such questions ...
113 views

### Unable to delete this post

I have been wanting to delete this post for quite sometime. Unfortunately a user already answered and my reputation is so low that I can’t accept or delete it. Note my original question is nothing ...
160 views

Earlier today, this answer to this question was converted to a comment by a moderator. The same moderator subsequently reconverted the comment back into an answer an hour or so later. One of the ...
123 views

### Request: Add the option to close to review tasks from the "first questions" queue

Reviewing something in the "First questions" queue, I currently have only three options: Leave it (i.e. approve it as is) Edit it Share feedback, i.e. either Leave a comment asking for ...
786 views

### Is it time to replace links to the UCDavis arXiv frontend?

This question from March 2020 points out that many questions/answers link to papers at the http://front.math.ucdavis.edu/ frontend instead of at the arXiv itself, but that the frontend had been down a ...
436 views

### Why was my probability question closed?

Why was my question closed here? Probability every team successfully presents a solution At a summer math program a contest is held for $n$ teams. Each team, composed of $n$ individuals, is given the ...
139 views

### How can I see the line length available for long mathematical expressions in posting on MO?

In typing up a question (or answer) on MO, I try to format a long mathematical expression so that it fits in one line. When I meet with apparent success, as shown in the wysiwyg box underneath the box ...
714 views

### Why is the "last seen 96 years ago" feature gone?

User homepages used to display the information "last seen ... (min/days/...) ago". It appears this feature is gone now. I found it useful, and while it does divulge some otherwise ...
371 views

### Questions on the mathoverflow newsletter

Good morning, everyone... I have a little question about the mathoverflow newsletter. Ever since I subscribed to it, I used to find it every Tuesday in my gmail inbox, but I have not received the ...
3k views

There has been an apparent case where the question poster asked a question that had been answered in their own paper from about 10 years before the question. This would not be a problem if the ...
192 views

### A case when the closure reason might be unclear to the OP (and possibly others)

There is this question I have read about the 3x+1 conjecture so I am thinking of 3x-1 instead closed as not research level. It is about replacing $3n+1$ with $3n-1$ in the Collatz conjecture. OP shows ...
310 views

### Why was this math puzzle question migrated to Science Fiction & Fantasy?

There was a recent question on MathOverflow which was just incorrectly migrated to Science Fiction & Fantasy (where it has been promptly deleted). I suspect the reason the question was migrated ...
258 views

### Help center text references a thread but doesn't indicate which one

In the "What about open problems?" section of https://mathoverflow.net/help, the last line says "To join the discussion about how MathOverflow should deal with open problems, go to this ...
172 views

### Asking whether this question will be suitable and hence answered by people on MO ? ( I will use career and advice tag)

I am thinking of asking this question on the MO website which is due to the fact that how should I write/ explain the gap in my CV while applying for PHD programs in 2022. Very brief of the situations ...
418 views

### Rationale for moderator deletion of a non-spammy, off-topic question

The Euler quote question "Why are people hanged if they talked" has been deleted by a moderator. I have the impression this is a new practice (correct me if I'm wrong), that deletions of off-...
137 views

This question about disc projections has a link to an animation of a Reuleaux triangle spinning inside a square. "That sounds cool, I want to see what that looks like!", I thought. ...
149 views

### Self advertising and posting a candidate constructive proof

I would like to learn about appropriateness of posting a candidate constructive proof that decides a conjecture or open question and asking for counter examples that render the proof incorrect. The ...
814 views

### Rationale for migration to MSE of a well-received question on MO

I was a bit surprised (annoyed?) by the migration of this question from MO to MSE. Yes, the question could have been asked on MSE, but it was asked on MO, received much attention there, with a high-...
181 views

### What happened to the stack exchange app for iOS?

The stackexchange app would no longer launch, I tried to reload it from the Mac App Store, and it’s not there (or at least, I could not find it). I probably missed some event, is there an alternative?
301 views

Happened to me recently, and I wonder whether this is acceptable kind of behaviour, and not basically stealing ideas to get points. In that particular case the person who asked the question appears to ...
211 views

### My question is removed

Recently my question entitled "Non existence of a parametrically compatible metric to a complete geodesible vector field on $\mathbb{R}^2\setminus\{p,q\}$" is removed. What is the reason?
529 views

### How to @ a user with non-Latin characters?

When typing comments, it's useful to use the "@" system to alert a user to a comment (and also to make it clear to a 3rd party who you are addressing a comment to, as comments have no "...
197 views

### What is the correct action if the OP finds an answer incorrect (with a recent example)?

While I certainly think that the OP of the question Non trivial zeros of Riemann zeta function definitely abuses MO in a couple of ways, still I believe it is a good example for the question in the ...
142 views

### What is yellow about? [duplicate]

Some questions asked at MO are emphasized with the color yellow. What does this mean, and how can one emphasize a question that way?
191 views

### Watched tags highlighting lost

On both Chrome Version 91.0.4472.77 and Safari Version 14.1.1 running on MacOS 10.15.7, I've lost the color-highlighting of front-page Top Questions in my Watched Tags list. Is this just my problem, ...
129 views

### Citation helper: can we have it automatically convert $$...$$s into \$...\$s?

Here is an example output of the citation helper in the case where the citation's title contains $\rm\LaTeX$ code (random paper found by searching for L^\infty) ...
957 views

### Prosus' acquisition and its effect on MathOverflow

Just saw the PROSUS acquisition news of StackOverflow. Does it have any effect on MathOverflow? In what way would it help or not help MO? Thanks beforehand.
795 views

### Using MathOverflow to help with referee work

Suppose I am refereeing a paper and wish to remain anonymous as referee. Suppose I had trouble understanding some of the proofs in the paper and made a post on MathOverflow and received a very helpful ...
94 views

### No MathJax line wrapping in Firefox

Example: Chrome, for comparison: Happens on Windows 10, both browsers are up to date. Should I use the bug tag? Does anybody else encounter this? Can it be something on my side? After the question ...
308 views

### Make it evident that bounties are non-refundable or refund them on other people's questions

When I went to place my first bounty about a month ago, the question wasn't mine and I almost put up 500 rep to draw as much attention as possible figuring I'd only have to surrender said rep if ...
51 views

### Math-mode formula in comment breaks incorrectly across lines

In the following comment, both summands should appear before the period: The source for the comment is: ...
690 views

There have been two questions today with suggestions (one acted on, at time of writing) to close, with the question being better asked at academia.stackexchange: Referee reports and Covid lessons. In ...