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

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Discrepancy between MathOverflow logo and this site's logo

There is a slight difference between the sizes of the boxes in the MO logo and the Meta.MO logo. The MO logo's box is slightly longer and the gap in the rightmost side is slightly less tall. The ...
C7X's user avatar
  • 1,308
4 votes
0 answers
144 views

Why doesn't the prime in $\sum_n'$ sit flush against the summation symbol?

The TeX snippets $\sum_n'$ \sum_n' and $\sum_n^\prime$ \sum_n^\prime should (as with all things TeX, barring trickery) be ...
LSpice's user avatar
  • 11.4k
0 votes
1 answer
215 views

Inconsistency in MO votes

Yesterday I sent this question to a friend of mine. He told me he upvoted my question. When I go to my notifications, I don't see the vote. But when I go to the history of my question, it can be seen ...
Emmanuel José García's user avatar
5 votes
0 answers
75 views

Missing brackets in $\{x\}$ in drafts, not missing in the final question/product

I am using the latest version of Firefox on Linux (bodhi linux) as well as Mac and Windows. Some $\LaTeX$ is not typeset correctly in MathOverflow: whenever I type a set, like the singleton $\{x\}$, ...
Dominic van der Zypen's user avatar
3 votes
0 answers
76 views

Including a hash character (#) in a math equation causes it to not render (in new-question page)

I want to ask a question about a paper that uses this notation: However, when I typeset it in MathJax with ...
Lawton's user avatar
  • 105
2 votes
1 answer
49 views

MathJax ignores a `\tag` in an `{equation}` containing a `{split}`

The following snippet, when compiled as part of a LaTeX document with appropriate packages loaded, would produce a numbered (well, \tagged) equation: ...
LSpice's user avatar
  • 11.4k
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 ...
Sam Hopkins's user avatar
3 votes
0 answers
41 views

Question titles do not auto-expand if URL contains non-ASCII characters?

Consider two versions of What is the modulus of continuity of this function that is continuous, increasing and bounded but nowhere locally Hölder?. Notice that, in the first version, the linked ...
LSpice's user avatar
  • 11.4k
1 vote
0 answers
163 views

Why is it taking so much longer than it used to for MathJax to get rendered?

These last few days when I click on a posting it sometimes takes more than a minute or even two, for MathJax to get rendered. It used to be a couple of seconds. Is anything being done to correct this?
Michael Hardy's user avatar
4 votes
1 answer
197 views

Why does revision 5 of MO120096 look empty?

I recently came across Andrea Mori's question Explicit Casselman theory: reference needed. The comments 1 2 make reference to matrices rendering poorly, and then being fixed, and I was curious what ...
LSpice's user avatar
  • 11.4k
0 votes
3 answers
265 views

How long are the lines?

I know that probably my place would be in a mental institution, but I'm a stickler about formatting my questions nicely. For example, I like to start each sentence in a new line, and I don't like if a ...
domotorp's user avatar
  • 18.4k
5 votes
1 answer
131 views

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
  • 5,851
6 votes
1 answer
107 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
137 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
  • 11.4k
3 votes
1 answer
131 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
  • 11.4k
5 votes
2 answers
188 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
  • 11.4k
7 votes
1 answer
191 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
  • 11.4k
6 votes
1 answer
207 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
98 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
  • 11.4k
7 votes
0 answers
82 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
3 votes
0 answers
228 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
4 votes
2 answers
89 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
-5 votes
2 answers
322 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
117 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
  • 11.4k
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
  • 11.4k
4 votes
0 answers
70 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
846 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
154 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
  • 11.4k
3 votes
0 answers
70 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
  • 11.4k
3 votes
1 answer
148 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
174 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
  • 11.4k
3 votes
1 answer
96 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
  • 11.4k
4 votes
1 answer
87 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
13 votes
0 answers
1k 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
2 votes
0 answers
217 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
  • 11.4k
-6 votes
1 answer
296 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
  • 5,282
3 votes
1 answer
99 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
  • 11.4k
3 votes
0 answers
150 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
121 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
  • 11.4k
1 vote
1 answer
95 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
  • 33.9k
4 votes
0 answers
80 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
  • 11.4k
7 votes
1 answer
210 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
177 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
  • 60.4k
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
  • 11.4k
5 votes
1 answer
268 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
  • 5,282
8 votes
0 answers
123 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
  • 78.8k
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
70 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
  • 11.4k
24 votes
4 answers
816 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
  • 61.7k

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