Questions tagged [bug]

Indicates you've found an erroneous or unexpected behaviour in the system that needs to be fixed.

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2 votes
0 answers
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Editor is not rendering the equations correctly

I haven't asked a question on Mathoverflow or Mathstackexchange but after while I decided to do so I have realized that the editor has got significantly worse. First of all it is significantly slower ...
user127776's user avatar
  • 5,719
5 votes
1 answer
98 views

Account merging

I have an issue with account merging form in the help center. The 'Your other profile link' does not accept any link to the second my account. Picture 1: Completed help form Picture 2: Outcome of ...
Sergei Ovchinnikov's user avatar
2 votes
1 answer
106 views

Why would an equation render on preview and in an external TeX compiler, but not in post?

I know the general phenomenon is that rendering of previews differs from rendering of posts, but, presumably, the goal is to minimise unnecessary discrepancies—and that, in particular, non-esoteric ...
LSpice's user avatar
  • 10.3k
3 votes
1 answer
119 views

Why does a table work on preview but not on post?

In waterstreamer's recent post, they used a table to present the possible Jordan normal forms of a $3\times3$ matrix. As they comment, and I checked, the table looks just fine on preview, but ...
LSpice's user avatar
  • 10.3k
5 votes
2 answers
183 views

Why do `* *`s and `** **`s stop being recognised at some point, and how can I fix the resulting inadvertent vandalism?

I recently submitted an edit to Another notion of exactness: how to refine it, and where does it fit? to replace hand-rolled commutative diagrams with AMScds, since ...
LSpice's user avatar
  • 10.3k
6 votes
1 answer
136 views

Having the MO Mathjax parser recognise \( \) is a regex away

@IsabelBeckenbach discovered why \( \) isn't accepted as a math-mode delimiter on MO. I'd always thought it was a design choice, but apparently it's just a mis-...
LSpice's user avatar
  • 10.3k
5 votes
1 answer
157 views

My gravatar has changed

My automatically generated Gravatar has changed. Is that normal? I thought they were supposed to be permanent. I used to have a purple pattern IIRC, now it is light blue, a color I have never seen. It ...
Federico Poloni's user avatar
2 votes
0 answers
88 views

Some arrows in commutative diagrams in comments are wrongly interpreted as @-notifications; and a bonus question about CDs on MMO

I left the following comment on Pullbacks in this category of vector spaces are intersections: Are the morphisms in your category isometries? Otherwise, I'm not sure why the category is left ...
LSpice's user avatar
  • 10.3k
6 votes
0 answers
73 views

The citation helper picks up a backlink to an MO answer when a DOI link is unavailable

In the citation helper, I searched for "Lectures on the approach to Iwasawa theory for Hasse-Weil L-functions via BdR". The unique result that shows up is the following (I've only edited two ...
The Amplitwist's user avatar
2 votes
0 answers
141 views

mathcal notation fails to render in Chrome

I recently noticed that "\mathcal" no longer renders. Example post but it renders fine in Safari Chrome: 111.0.5563.146 (Official Build) (x86_64) Safari: Version 16.4 (18615.1.26.11.22) ...
Yaroslav Bulatov's user avatar
3 votes
2 answers
88 views

Can’t vote to close question as duplicate of question without an answer

I tried to vote to close Einstein problem; on mirror symmemtry as a duplicate of Aperiodic monotile without reflections?. But the software gave me an error I wasn’t expecting: it said because the ...
Sam Hopkins's user avatar
  • 21.3k
-4 votes
2 answers
312 views

Is there a penalty for merely looking at a question, comments and an answer?

Recently I have lost 2 reputation points for merely looking at a question, comments and an answer (1 point for reading the question "Large cardinals in $ZF$ + $DC$ + $AD$, and 1 point for reading ...
Thomas Benjamin's user avatar
5 votes
1 answer
107 views

Why is the wrong username showing up on a CW answer after a user changes names?

An answer to Interesting examples of vacuous / void entities was written, and only edited by, @JonasLinssen: However, the answer shows up as having been written by @PrudiiArca: The text "...
LSpice's user avatar
  • 10.3k
3 votes
0 answers
57 views

Cannot "Mark all as read" under very specific circumstances

This might deserve to be closed; it seems to be a bug, but a very, very minor one. The conditions under which I observed it were rather specific. I'm not sure which of the conditions were important, ...
LSpice's user avatar
  • 10.3k
4 votes
0 answers
67 views

MathJax in edited question title gets badly mis-parsed in diff view

A recent question received an edit to its MathJax, including in the title. Viewing the diff in the edit history, the edited MathJax in the title gets very badly mis-parsed in the diff view, as shown ...
Peter LeFanu Lumsdaine's user avatar
24 votes
2 answers
826 views

Kitty can’t fix it — Old questions inaccessible for logged-in users, giving “unexpected error”

For the past few days, any attempt to access the question Collecting proofs that finite multiplicative subgroups of fields are cyclic results in an internal server error: It seems the poor kitten ...
Emil Jeřábek's user avatar
3 votes
0 answers
119 views

In Safari on macOS, a numbered list beginning with a displayed equation swallows the number

This bug report did not originally mention the platform and the renderer. I originally put them at the end, but it occurs to me that they're more useful up front. Thanks to @DavidRoberts and @...
LSpice's user avatar
  • 10.3k
3 votes
0 answers
66 views

AMScd columns not aligning

The code \require{AMScd}\begin{CD} 0 @>>> \mathbf D(C) \\ 0 @>>> M \end{CD} produces $$\require{AMScd}\begin{CD} 0 @>>> \mathbf D(C) \\ ...
LSpice's user avatar
  • 10.3k
3 votes
1 answer
140 views

Spoiler mechanism not working

In a recent answer I've tried to hide some text. Unfortunately, something seems broken. Here's the not-so-hidden text: ! Let $X$ be the set of complete theories that satisfy "everything is ...
Noah Schweber's user avatar
4 votes
1 answer
142 views

Double overline renders poorly, except in MathML

A post Mathematical formulation of beam: get stress/strain from forces and momentum uses \overline{\overline{…}}. The results below are mostly from Safari 16.1 on ...
LSpice's user avatar
  • 10.3k
3 votes
1 answer
94 views

Integral sign cut off in Safari

I am using Safari version 16.1 with the HTML-CSS renderer. A displayed formula in the post Convergence by parameter involving inf renders as follows: This happens even with extensions disabled, but ...
LSpice's user avatar
  • 10.3k
4 votes
1 answer
86 views

Occasional "echoed" usernames in Firefox

I noticed about a month ago that quite often in the latest version of Firefox (but not in Chrome) under Windows 11 usernames become distorted like this Does anybody else see this or it is just me? ...
მამუკა ჯიბლაძე's user avatar
12 votes
0 answers
778 views

Did mathcal stop working properly?

Does this question Basic algebra of $\mathcal{O}_0(\mathfrak{sl}_n(\mathbb{C}))$ — Reference request look like this for anyone else?: Those squares are supposed to be \mathcal{O}'s. As far as I can ...
Sam Hopkins's user avatar
  • 21.3k
2 votes
0 answers
137 views

Facebook and Twitter links disappear ungracefully

I am using Safari 16.1 on macOS 12.6. The invitation to "Share a link to this question" appears for me like this: I assume that the Twitter and Facebook links are not showing because of ...
LSpice's user avatar
  • 10.3k
-6 votes
1 answer
291 views

Where did the reputation go?

Some time ago, it was decided that reputation should no longer be displayed by default, but users had the possibility to opt in to see it, as explained by Ben Webster. I had opted to see reputation, ...
Alex M.'s user avatar
  • 5,067
3 votes
1 answer
95 views

Edit history lost on migration

According to a comment, @Marco's answer to Notation about n choose k permutations was edited before migration. However, nothing displays in the edit history. (This seems appropriate to ask here since ...
LSpice's user avatar
  • 10.3k
3 votes
0 answers
147 views

Weird site URLs

If I go to MathOverflow from another SE site by clicking on the link in “Your Communities” under the right-most menu on the top-bar, I do not end up with the usual ...
Emil Jeřábek's user avatar
1 vote
1 answer
81 views

Long post fails to render

In one MathOverflow answer by me, the MathJax code added latest fails to render correctly. Instead, one $ tag is ignored and for the rest on the line, code inside <...
Arvid Samuelsson's user avatar
3 votes
1 answer
110 views

Why is there unexpected space at the beginning of a paragraph in an answer?

In @GabeK's nice answer to @JonBannon's question Each mathematician has only a few tricks, there is unexpected space at the beginning of the third paragraph: My first thought was that there might be ...
LSpice's user avatar
  • 10.3k
1 vote
1 answer
93 views

Icons for MO/metaMO in community list changed?

I notice that in the community list under the SE hamburger in the top right, the icons for MO and for meta have changed: clearly having the MO logo attached to meta.math.SE is an issue, but we are ...
David Roberts's user avatar
  • 32.9k
4 votes
0 answers
76 views

Limits on overflowed integrals are too far away from the integral sign

I edited Multiplying divergent integrals using Hardy fields approach to put equations clearly meant to be displayed in display mode. Once I did so, one of the equations exhibited very strange spacing,...
LSpice's user avatar
  • 10.3k
7 votes
1 answer
201 views

Reputation number not visible on main page

This is a very minor bug, but the reputation number seems not to be visible on the main site: Interestingly, it is visible in meta:
Noah Schweber's user avatar
7 votes
0 answers
175 views

Diamond moderator symbols and old posts

This question, or rather, (vague) feature-request is not specific to MO; however I leave it to more experienced (and with better skill in writing English) users to possibly ask it elsewhere. ...
YCor's user avatar
  • 57.7k
2 votes
1 answer
52 views

Link not being processed

At What kind of topological invariants can you get from just Hopf algebras?, link [4] is not being processed: However, it is there in the source: ...
LSpice's user avatar
  • 10.3k
5 votes
1 answer
234 views

Long display style formulae extend too much to the right with some renderers

In the following screen capture, take a look at the region delimited by the red rectangle: notice how it extends too much to the right, such that a part of it becomes hidden by the yellow page element....
Alex M.'s user avatar
  • 5,067
8 votes
0 answers
116 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 ...
Timothy Chow's user avatar
  • 75.8k
2 votes
0 answers
62 views

Badges appear to have disappeared [duplicate]

It looks like badges are no longer showing on users when browsing questions/answers: The badges appear while the pages loads, but as soon as the mathjax fully loads, they disappear. Checking other SE ...
caird coinheringaahing's user avatar
4 votes
0 answers
68 views

Occasionally reproducible bug with macro definitions in a draft post affecting macro use in comments

In the course of a discussion involving using MathJax to re-define macros, I couldn't recall if MathJax obeys a \newcommand for an already-defined macro, and so ...
LSpice's user avatar
  • 10.3k
24 votes
4 answers
802 views

What is the deal with changes to the front page?

It appears that today Stack Exchange has changed the appearance of the MathOverflow front page. It now looks more similar to Stack Overflow. The most noticeable change is that the counts of answers, ...
Tim Campion's user avatar
  • 56.7k
6 votes
1 answer
164 views

Reputation displays after an edit even if opted out

I mentioned this in a comment on the main announcement regarding not automatically displaying reputation, but perhaps it is worth making into a formal bug report. After I edit a post, reputation is ...
LSpice's user avatar
  • 10.3k
35 votes
2 answers
1k views

Reputation and badges are no longer visible next to the users' names

Right now it seems that a bug is affecting MO: reputation and badges are no longer displayed next to the users' names. This happens both on the front page: as well as on pages of individual questions:...
Alex M.'s user avatar
  • 5,067
11 votes
0 answers
97 views

On a MathOverflow post, the members' reputation for a question & answer shows briefly but then disappears [duplicate]

When I was just viewing the MathOverflow Improving Cauchy estimates?, this is what I see for the question & answer members' "flair" sections: Doing a refresh causes the reputations to ...
John Omielan's user avatar
3 votes
0 answers
137 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 <...
LSpice's user avatar
  • 10.3k
1 vote
1 answer
209 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 ...
user avatar
4 votes
1 answer
326 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 ...
Tony Huynh's user avatar
  • 30.2k
11 votes
0 answers
195 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, ...
Joseph O'Rourke's user avatar
3 votes
0 answers
60 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: ...
LSpice's user avatar
  • 10.3k
5 votes
0 answers
96 views

Can't submit edit review

I was prompted to review some edits with the little dot in the upper right hand corner, but when I went to do my editorial duty I found that only the 'skip' button was clickable: I tried selecting ...
Alec Rhea's user avatar
  • 8,768
8 votes
2 answers
177 views

Previewed post does not match rendered post when MathJax uses *

In revision 2 of Number of permutations in $S_{a + b}$ with $\operatorname{maj}(\pi) = b$ and $\operatorname{maj}(\pi^{-1}) = b$, I edited an equation that had been manually given the label ...
LSpice's user avatar
  • 10.3k
4 votes
0 answers
113 views

Is anybody else not seeing comments on their iPhone?

Starting last night I can no longer see comments when using the site on my iPhone, nor can I comment. Things are fine on my iPad just not my iPhone. I am wondering if anybody else has ever had this ...
Benjamin Steinberg's user avatar

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