Recent Questions - MathOverflow Metamost recent 30 from meta.mathoverflow.net2024-07-21T09:59:12Zhttps://meta.mathoverflow.net/feedshttps://creativecommons.org/licenses/by-sa/4.0/rdfhttps://meta.mathoverflow.net/q/60048goo.gl is closing downFederico Polonihttps://meta.mathoverflow.net/users/18982024-07-18T22:37:39Z2024-07-19T09:35:56Z
<p><code>goo.gl</code>, a URL shortener service from Google, is shutting down, and in one year it will no longer work: <a href="https://news.slashdot.org/story/24/07/18/216211/google-url-shortener-links-will-return-a-404-response" rel="nofollow noreferrer">https://news.slashdot.org/story/24/07/18/216211/google-url-shortener-links-will-return-a-404-response</a> . All links using <code>goo.gl</code> on MO will need to be updated.</p>
<p>When searching on MO for <code>goo.gl</code> I get 8 results in questions/answers, which can be edited, but there are more in the comments like <a href="https://mathoverflow.net/questions/42124/methods-for-interpolating-a-function-holomorphic-in-the-upper-halfplane#comment101383_42405">this one</a>, and those cannot be edited by normal users.</p>
<p>[EDIT: a <a href="https://chat.stackexchange.com/transcript/message/65980001#65980001">better search</a> by Martin Sleziak returns about 55 hits on MO including comments.]</p>
<p>How should we handle this migration?</p>
https://meta.mathoverflow.net/q/6001-6Can I know why my post was deleted by a bot?ALINhttps://meta.mathoverflow.net/users/1600182024-07-16T17:00:05Z2024-07-18T01:32:06Z
<p>My question <a href="https://mathoverflow.net/questions/470448/compiling-a-list-of-schauder-bases-for-function-spaces?noredirect=1#comment1230363_470448">Compiling a List of Schauder Bases for Function Spaces</a> was deleted by a bot, I want to know why.</p>
https://meta.mathoverflow.net/q/59975Possible delay/review to deal with troll postsNoah Schweberhttps://meta.mathoverflow.net/users/81332024-07-08T04:29:48Z2024-07-08T05:01:47Z
<p>In light of the ongoing garbage flood, I am curious whether the following would be possible to institute (and/or a good idea):</p>
<ul>
<li><p>When a new/unregistered (or under-X-rep.) account posts an answer or question, it does not become public for 24 hours (or some other period of time).</p>
</li>
<li><p>During that time period, the post <em>is</em> viewable by sufficiently-high-rep users on some queue so that anyone with the opportunity can do some spam filtering.</p>
</li>
</ul>
<p>I think that making it harder for garbage posts to become visible might deter trolls, at least to a certain extent. (But maybe I'm optimistic.)</p>
https://meta.mathoverflow.net/q/59943Site in read-only mode, but users are still posting new materialGerry Myersonhttps://meta.mathoverflow.net/users/36842024-07-04T09:07:46Z2024-07-05T09:00:17Z
<p>For a day now, every time I go to MathOverflow, it says "This site is currently in read-only mode. We’ll return with full functionality soon." But I also see what appear to be new posts from other users, e.g., the new question,
<a href="https://mathoverflow.net/questions/474450/conjecture-about-primes-of-a-special-form">Conjecture about primes of a special form</a>
posted just a few minutes ago. What is going on here?</p>
https://meta.mathoverflow.net/q/5987-8What do you think about the following MO question?ResearchMathhttps://meta.mathoverflow.net/users/5141292024-06-30T09:07:16Z2024-07-04T03:45:11Z
<p><strong>What do you think about the following MO question?</strong></p>
<p>By posting this question for feedback I am following David Roberts' very patient and kind <a href="https://meta.mathoverflow.net/questions/5983/dispute-100-rep-decision/5984?noredirect=1#comment31156_5984">advice</a>.</p>
<p><em>If you have already seen the question below please don't skip to read the italicized text below.</em></p>
<p>"<strong>What are some theorems by deceased or retired authors published in peer reviewed journals or otherwise reputable sources that are widely accepted to be true but that you happen to know are actually false?</strong></p>
<p>I am guessing we all encounter this from time to time, but there is no appropriate place to share them. Slowly but surely the mathematical literature is becoming a minefield if we all keep this information to ourselves.
I will start with sharing an example. It concerns homotopy invariance of the Leray-Schauder fixed point index for compact and compactly fixed maps which I explained in detail <a href="https://mathoverflow.net/questions/473621/is-homotopy-invariance-of-the-leray-schauder-fixed-point-index-for-compact-and-c">here</a>.</p>
<p>Thanks a lot for sharing your knowledge!</p>
<p>Note 1: the above question is different from <a href="https://mathoverflow.net/questions/35468/widely-accepted-mathematical-results-that-were-later-shown-to-be-wrong">this question</a> which concerns results that are currently widely accepted to be false.</p>
<p>Note 2: if the author is not deceased or retired then <a href="https://mathoverflow.net/questions/31337/how-do-i-fix-someones-published-error?_gl=1*11bbnd8*_ga*MTI4OTkwOTgyNS4xNzE1MzQ2NzY5*_ga_S812YQPLT2*MTcxOTc0NDM2OS4xNTUuMS4xNzE5NzQ0NzczLjAuMC4w">this question</a> has some suggestions of how one could handle it."</p>
<p><em>Please allow me a few words to explain why this is important to me. Firstly, it may be relevant to know that I am autistic and I have great difficulty understanding other people's feelings. Truth and Mathematics are my main focus in life. None of this is aimed at anyone personally. I am not at all trying to be mean or anything, quite the opposite. I have experienced a lot of suffering myself because of mistakes in the mathematical literature. For example, by thinking for several weeks that I had made a huge breakthrough only to be disappointed later when I found out that a certain theorem I used was false. I was actually lucky that I hadn't made my work public yet, I can't imagine the pain, stigma and public humiliation if I had made my work public. It is therefore my sincere belief that the above question will actually reduce the total amount of suffering by mathematicians in the world. Sure, some retired mathematicians will be disappointed if they find out that some part of their work is wrong, but the suffering will end there and not propagate further to future mathematicians. As a serious mathematician, is it really better to die without knowing the truth? If you reap what you sow, if there is a law of karma, then it is only in your best interest that your mistakes are corrected quickly and don't propagate and become the reason for further suffering in the world. Your own total suffering would only increase then. May the truth set us free.</em></p>
https://meta.mathoverflow.net/q/59864Why doesn’t the LaTeX render here?Sidharth Ghoshalhttps://meta.mathoverflow.net/users/465362024-06-28T02:46:52Z2024-07-20T09:59:34Z
<p>This <a href="https://mathoverflow.net/questions/473848/other-kind-of-supercongruences-for-rational-ramanujan-like-series" title="Other kind of supercongruences for rational Ramanujan-like series">question</a> has a block of valid LaTeX which doesn’t render when viewed except on edit mode. Below are 2 screenshots from my phone. One in edit mode and the other in regular mode.</p>
<p><a href="https://i.sstatic.net/Lh62r7od.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Lh62r7od.png" alt="Edit mode, rendered successfully" /></a></p>
<p><a href="https://i.sstatic.net/376AQ1lD.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/376AQ1lD.png" alt="Regular mode, digit string rendered as phone number" /></a></p>
<p>I used <a href="https://www.quicklatex.com/" rel="nofollow noreferrer">QuickLaTeX</a> to confirm the MathJax was valid.</p>
https://meta.mathoverflow.net/q/5983-14dispute -100 rep decisionResearchMathhttps://meta.mathoverflow.net/users/5141292024-06-26T16:49:16Z2024-06-28T11:00:42Z
<p>I was given -100 reputation for this sound mathematical post <a href="https://mathoverflow.net/questions/473947?noredirect=1#comment1231454_473947">https://mathoverflow.net/questions/473947?noredirect=1#comment1231454_473947</a></p>
<p>This is excessive and I want to dispute this decision, how do I do this?</p>
<p>I propose to compromise and edit the question so that it only concerns results by deceased or retired authors. Here is what I propose:</p>
<p><strong>What are some theorems by deceased or retired authors published in peer reviewed journals or otherwise reputable sources that are widely accepted to be true but that you happen to know are actually false?</strong></p>
<p>I am guessing we all encounter this from time to time, but there is no appropriate place to share them. Slowly but surely the mathematical literature is becoming a minefield if we all keep this information to ourselves.
I will start with sharing an example. It concerns homotopy invariance of the Leray-Schauder fixed point index for compact and compactly fixed maps which I explained in detail <a href="https://mathoverflow.net/questions/473621/is-homotopy-invariance-of-the-leray-schauder-fixed-point-index-for-compact-and-c">here</a>.</p>
<p>Thanks a lot for sharing your knowledge!</p>
<p>Note: the above question is different from <a href="https://mathoverflow.net/questions/35468/widely-accepted-mathematical-results-that-were-later-shown-to-be-wrong">this question</a> which concerns results that are currently widely accepted to be false.</p>
<p>Thanks</p>
<hr />
<p>Here's a screenshot of the question, containing all the body text. The title of the question is the same as the first sentence.</p>
<p><a href="https://i.sstatic.net/xVarpaEi.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/xVarpaEi.png" alt="Screenshot of the linked question" /></a></p>
https://meta.mathoverflow.net/q/59794Edit summary rejected with "Comment reserved for system use. Please use an appropriate comment."LSpicehttps://meta.mathoverflow.net/users/23832024-06-25T17:58:03Z2024-07-06T20:47:25Z
<p>I recently tried to submit an edit to <a href="https://mathoverflow.net/questions/473873/why-does-an-invariant-measure-define-a-schwartzman-cycle">Why does an invariant measure define a Schwartzman cycle?</a> No matter what I put in my edit summary, it was rejected with the message "Comment reserved for system use. Please use an appropriate comment."</p>
<p><a href="https://i.sstatic.net/lGtAMCM9.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/lGtAMCM9.png" alt=""Comment reserved for system use. Please use an appropriate comment."" /></a></p>
https://meta.mathoverflow.net/q/5972-1Asking for consensus on mathematical conventions/definitionsalpacahaircuthttps://meta.mathoverflow.net/users/1133402024-06-15T03:18:51Z2024-06-19T02:12:19Z
<p>Is this (mathoverflow or meta) a reasonable place to ask nuanced questions about how the mathematical community interprets mathematical terms and how they are used in common questions? For example: is it "ok" to ask for the "roots of an equation", or does the term "root" only apply to the zeros of a function? So "find the roots of <span class="math-container">$f(x)=g(x)$</span>" is not a well-posed question, whereas "find the roots of <span class="math-container">$f-g$</span>" is, i.e. functions have "roots" equations have "solutions".</p>
<p>I know I can ask math.stackexchange, but in general, I don't feel like the answers given there are representative of expert opinion. In the case of my above example, the task is clear in either case. I am wondering if the professional community would (more-or-less) unanimously decide that one is "correct" and the other is "incorrect". More apropos to the question at hand, I am asking, if asking this question on this platform is within the platform's scope, or should it be asked elsewhere?</p>
https://meta.mathoverflow.net/q/597016Why is the site being flooded with junk right now? What is being done about it?Sam Hopkinshttps://meta.mathoverflow.net/users/250282024-06-09T22:48:55Z2024-07-04T03:29:42Z
<p>Right now the site is being flooded with posts from new users, with pseudonymous names, who use a mixture of obvious AI-generated nonsense mathematics and weird sentences (sometimes borderline offensive?) about things that have nothing at all to do with math (which are I would guess actually written by humans and not AI).</p>
<p>Why is this happening right now? Are the moderators aware of the situation? What is being done to address it?</p>
<p>If this continues, the site will become increasingly non-functional.</p>
<p><strong>EDIT</strong>: I am sorry to bump this meta question, but the site continues to be flooded with AI-generated nonsense answers. The stuff that is obviously trolling has died down a bit based on my subjective impressions. But there are a ton of AI (non-)answers posted every day, especially to the more "computational" questions. Although I have no direct evidence, I am worried that people might be trying to train AI based on interacting with MO. If that happened at scale, it would really make the site awful. Any more thoughts about what can be done to combat this?</p>
https://meta.mathoverflow.net/q/5967-9User destroyed without explanations or obvious reasonsAlex M.https://meta.mathoverflow.net/users/547802024-06-06T10:22:16Z2024-06-06T20:14:11Z
<p>Yesterday (June 6), somebody posted <a href="https://mathoverflow.net/a/472689/">this answer</a> (now deleted, so users with <10k reputation will not see it). I have not bothered checking whether it is correct, but it surely looks reasonable, and is surely not AI-produced. I cannot see the up- and down-votes, but I can see that the total was 0. There are no comments under it. So probably a "meh" answer, but definitely not a fraudulent one. Therefore, now comes the weird part: the answer got deleted by the "Community" user, and the user got destroyed!</p>
<p>I find this very brutal. Could the moderators verify the events and offer some explanations, please? I am afraid only that the heuristic used by "Community" (which is an entirely algorithm-driven user) might have made an innocent victim.</p>
https://meta.mathoverflow.net/q/59623Do lookalike characters in question titles pose any risks?LSpicehttps://meta.mathoverflow.net/users/23832024-05-29T20:06:45Z2024-05-29T20:30:11Z
<p>Attacks via "<a href="https://krebsonsecurity.com/2018/03/look-alike-domains-and-visual-confusion" rel="nofollow noreferrer">lookalike domains</a>" are a known malicious trick. Is any risk posed by a lookalike question title?</p>
<p>I know that's rather vague, and it's a concern that seldom arises. I give an example, but my question is not specifically about the example.</p>
<p>Today's question <a href="https://mathoverflow.net/revisions/472240/1">Generał equation for <span class="math-container">$\int_{0}^{\infty}\frac{2-(f(x+it)+f(x-it))}{e^{2 \pi t}-1}dt$</span></a> is only the second time I've seen it—which, as the saying goes, <a href="https://knowyourmeme.com/memes/dr-doofenshmirtz-if-i-had-a-nickel" rel="nofollow noreferrer">isn't a lot, but it's weird that it happened twice</a>. (Unfortunately, I've forgotten what the first occurrence was.) The accidental substitution of ł for l seems unlikely, and its occurrence in the first post by a new user makes me suspicious, but, on the other hand, I can't see what harm it can do.</p>
<p>Again, without focusing on this particular example (unless it is relevant to the answer), can any more suspicious-minded MathOverflowian help me see the threat that something like this could pose (in which case the post should be flagged for moderator attention), or should I just edit it (as I <a href="https://mathoverflow.net/revisions/472240/2">did</a> in this case) and move on?</p>
https://meta.mathoverflow.net/q/595116Users using AI to write lots of answersgmvhhttps://meta.mathoverflow.net/users/452502024-05-22T07:44:37Z2024-07-04T03:34:16Z
<p>Recently, there are a lot of new pseudonymous users with a peculiar pattern of posts: only answers, no questions, in lots of widely differing areas of mathematics (where it is unlikely that one random pseudonymous person is expert in all of them), posted in quick succession, which often look OK superficially (including MathJax an all), but actually miss some important step or make unwarranted assumptions or abuse notation in odd ways. I strongly suspect that these users are using AI tools to write their answers.</p>
<p>What should one do about these cases? (Especially if some answers <del>are actually not that bad and</del> get upvotes and accepts?)</p>
https://meta.mathoverflow.net/q/595016New bolded tags?Alec Rheahttps://meta.mathoverflow.net/users/921642024-05-21T18:27:42Z2024-05-22T09:23:38Z
<p>The past few days, I’ve noticed that the question tags on the main site are now <strong>bolded</strong>; is there any way to revert them back to normal? (Not the end of the world, but I find it distracting more than anything else.)</p>
https://meta.mathoverflow.net/q/594526OpenAI and MathOverflow?J.J. Greenhttps://meta.mathoverflow.net/users/57342024-05-11T10:49:04Z2024-06-09T23:04:30Z
<p>The <a href="https://openai.com/index/api-partnership-with-stack-overflow/" rel="nofollow noreferrer">agreement</a> between SO and OpenAI seems to have resulted some ill humour. Does MO plan to follow?</p>
https://meta.mathoverflow.net/q/59425Is something wrong with the citation helper?Jeremy Rickardhttps://meta.mathoverflow.net/users/229892024-05-09T19:12:04Z2024-05-11T08:22:23Z
<p>I've found the <a href="https://meta.mathoverflow.net/questions/2583">citation helper</a> very useful for inserting references in posts, and I always used to be very impressed at its ability to find details of even some quite obscure papers.</p>
<p>But recently it seems to have been frequently failing to find papers that I'd really expect it to find.</p>
<p>Has anybody else noticed this, and if so, does anybody know what's up?</p>
<p>As an example, if I search for one of my own papers with the search terms "Equivalences of derived categories for symmetric algebras Jeremy Rickard", which is the complete title and author, it doesn't find it. This is a 2002 paper (so not ancient, but not recent) in the Journal of Algebra (so far from an obscure journal). Maybe it just has good taste! However, it did find several quite closely related papers, some by me, and at least one that was also in the Journal of Algebra a few years later.</p>
https://meta.mathoverflow.net/q/59390Announcement: A stacks project for category theoryEmilyhttps://meta.mathoverflow.net/users/1300582024-05-06T15:38:58Z2024-05-06T15:38:58Z
<p>I'm releasing today <a href="https://clowderproject.com" rel="nofollow noreferrer">The Clowder Project</a>, a tag-based wiki and reference for category theory powered by <a href="https://gerby-project.github.io/" rel="nofollow noreferrer">Gerby</a>.</p>
<p>I plan to eventually make it into a comprehensive resource for category theory, in the same way that the Stacks Project is a comprehensive resource for algebraic geometry.</p>
<p>As of writing, it consists of 578 pages, with around 4000 more pages of material on category theory being slowly polished and converted into a form that works with Gerby. There are also 6000 more pages of material on other subjects which might eventually also make their way into it, as they either serve as either illustrating examples or stepping stones.</p>
<p>Here are some links:</p>
<ul>
<li>The website: <a href="https://clowderproject.com" rel="nofollow noreferrer">https://clowderproject.com</a></li>
<li>The GitHub project with the source files: <a href="https://github.com/topological-modular-forms/the-clowder-project" rel="nofollow noreferrer">link</a></li>
<li>Everything currently released in PDF form: <a href="https://raw.githubusercontent.com/topological-modular-forms/clowder-project-output/master/tags-book/alegreya-sans-tcb.pdf" rel="nofollow noreferrer">link</a></li>
<li>The Discord server for the project, for discussions and updates: <a href="https://discord.gg/b98uG2MWgc" rel="nofollow noreferrer">link</a></li>
</ul>
https://meta.mathoverflow.net/q/59371What tags are appropriate for a "reverse" reference request?Kepler's Trianglehttps://meta.mathoverflow.net/users/5270102024-05-04T20:06:52Z2024-05-06T21:43:36Z
<p>I have a just asked a question, <a href="https://mathoverflow.net/q/470585/527010">searching for information on a reference</a>, but I'm not sure what tags to use. I know the reference, although I know no further details about it.</p>
<p>A similar question searching for <a href="https://mathoverflow.net/q/345108/527010">a digital copy of an unpublished paper by Thurston</a> uses the "reference-request" tag which I have also used in my question.</p>
<p>However, I do not know if this tag is appropriate as the reference is already known. In both cases, further details are needed about the reference.</p>
<p>What are the appropriate tags for these questions?</p>
https://meta.mathoverflow.net/q/592739MO answer formalized in LeanBjørn Kjos-Hanssenhttps://meta.mathoverflow.net/users/46002024-04-21T04:40:44Z2024-05-07T03:37:18Z
<p>I have formalized an answer at
<a href="https://mathoverflow.net/questions/364808/homeomorphisms-and-mod-finite/364844#364844">Homeomorphisms and "mod finite"</a>
by @VilleSalo, in
<a href="https://github.com/bjoernkjoshanssen/bay/blob/main/ville-salo.lean" rel="nofollow noreferrer">a moderately-sized Lean file</a>.</p>
<p>Outcome: his claims turned out to be 100% accurate.</p>
<p>(The only stumbling block was that for me, it was easier to prove continuity of the inverse directly rather than appealing to general theory of compact and Hausdorff spaces.)</p>
<p>Has anyone verified other MathOverflow answers?</p>
https://meta.mathoverflow.net/q/592419More spam bots than usual?Sam Hopkinshttps://meta.mathoverflow.net/users/250282024-04-18T00:39:41Z2024-05-05T06:29:41Z
<p>Has anyone noticed the site getting a lot more spam posts than usual over the past couple days? The ones I've seen repeatedly have "BingX referral codes" or similar codes for Bitcoin or other cryptocurrencies or something. Are the moderators aware of this problem? Is there something normal users can do to help?</p>
<p>EDIT: Something further I've noticed about this recent spate of spam bots is that they sometimes post in languages other than English (I've noticed Turkish in particular but I think there are several).</p>
https://meta.mathoverflow.net/q/553155ChatGPT strikes MathOverflowDmitri Pavlovhttps://meta.mathoverflow.net/users/4022022-12-08T21:49:11Z2024-05-31T05:11:11Z
<p>The user (or a bot) <a href="https://mathoverflow.net/users/496085/canvas123">https://mathoverflow.net/users/496085/canvas123</a> appears to be posting ChatGPT-generated text on MathOverflow.</p>
<p>Two “answers” by this user already got accepted (!):</p>
<ul>
<li><p><a href="https://mathoverflow.net/questions/436174/when-is-a-subspace-of-the-cohomology-of-a-smooth-projective-scheme-on-k-a-moti/436178#436178">When is a subspace of the cohomology of a smooth projective scheme on $k$ a motive?</a></p>
</li>
<li><p><a href="https://mathoverflow.net/questions/436173/can-we-get-that-pn2-3-lambda-n-lambda-n-1-le-c-ge-1-epsilon/436177#436177">Can we get that $ P(N^{2/3}(\lambda_N-\lambda_{N-1})\le c)\ge 1-\epsilon$?</a></p>
</li>
</ul>
<p>The question
<a href="https://mathoverflow.net/questions/436170/does-every-monoidal-abelian-category-admit-an-exact-lax-monoidal-functor-to-abe">Does every monoidal abelian category admit an exact, lax monoidal functor to abelian groups?</a>
has an answer by this user with all the telltale signs of being computed-generated. In particular, the “commutative diagrams” are nonsensical, and the poster is “unaware” of this.</p>
https://meta.mathoverflow.net/q/433913Can we get rid of the "featured on meta" main meta links?Federico Polonihttps://meta.mathoverflow.net/users/18982019-09-03T11:37:11Z2024-05-10T19:16:16Z
<p>As you know, MathOverflow has a special status in the Stack Exchange family, and (by a special agreement) it doesn't display any kind of ads nor links to the hot network questions in the sidebar.</p>
<p>Would it be possible to remove also the links to the global meta questions in the "featured on meta" top-right sidebar? For instance currently I would remove the two top links, leaving only the third one.</p>
<p><a href="https://i.sstatic.net/C37ej.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/C37ej.png" alt="enter image description here" /></a></p>
<p>I don't find them particularly useful. To me they are just fluff and they make <em>our</em> meta questions stand out less; they take up premium space in the top right part of the page "above the fold".</p>
<p>Also, under a suitable interpretation of the expression, arguably they can be considered "internal advertisements", and so they would be forbidden by the <a href="https://drive.google.com/file/d/1-Rx93qiEH3t9wAwsyvuVzjawF62X6OgI/view" rel="nofollow noreferrer">agreement</a> between MO and SE, which can be found <a href="https://meta.mathoverflow.net/questions/969/who-owns-mathoverflow/970#970">in this answer by François G. Dorais♦</a>. The relevant part is:</p>
<blockquote>
<ol start="5">
<li>It is understood that MathOverflow shall consider in the future the placement of certain announcement services like job listing in the future. Stack Exchange shall not run advertisements, including internal advertisements, on MathOverflow 2.0 (or any subsequent version thereof), without specific and advance written consent of the MathOverflow.</li>
</ol>
</blockquote>
<p>EDIT: everything I wrote applies also to the SE blog entries:</p>
<p><a href="https://i.sstatic.net/rP493.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/rP493.png" alt="enter image description here" /></a></p>
<p>EDIT: and yet another example of blatant self-advertising that does not do us users any good:</p>
<p><a href="https://i.sstatic.net/jZe1b.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/jZe1b.png" alt="enter image description here" /></a></p>
<p>EDIT: clearly this one fits the definition of "internal advertisement" and is a violation of the agreement:</p>
<p><a href="https://i.sstatic.net/UmiNKLDE.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/UmiNKLDE.png" alt="enter image description here" /></a></p>
https://meta.mathoverflow.net/q/314450News of potential interest to the MO communityLuciahttps://meta.mathoverflow.net/users/386242017-02-20T06:05:04Z2024-07-20T02:31:52Z
<p>Occasionally, there has been a suggestion to start a meta question to collect information that might be of interest to the MO community. This is an attempt to start such a thread.</p>
<p>Is there any news that you think would be of wide interest to the MO community? Please exercise your discretion in any answers, and your judgement on the appropriateness or significance of any event.</p>
https://meta.mathoverflow.net/q/259612Braces don't render in previewNate Eldredgehttps://meta.mathoverflow.net/users/48322015-11-22T18:12:50Z2024-06-05T04:45:42Z
<p>When I type braces in math mode in a post, like <code>$\{1,2,3\}$</code>, they don't show up in the preview. See the following screen shot.</p>
<p><a href="https://i.sstatic.net/2YlAj.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/2YlAj.png" alt="enter image description here"></a></p>
<p>I tried all the different Math Renderer options, and disabling Fast Preview, with the same results.</p>
<p>This affects the main MO site, but not Meta.MO (so don't try to test it on this post).</p>
<p>When I submit the post, the braces show up correctly. Likewise, existing posts seem to render fine, but if I try to edit them, I don't see braces in the preview.</p>
<p>Typing <code>$\\{1,2,3\\}$</code> makes the braces appear in the preview, but I expect this would mess up the output in the actual post.</p>
<p>I'm pretty sure this just started recently, as I think I would have noticed it before.</p>
<p>I can reproduce this with Firefox 42.0 on Ubuntu and Safari 9.0 on iOS (using the Full Site).</p>
https://meta.mathoverflow.net/q/190814KaTeX vs MathJaxTadashihttps://meta.mathoverflow.net/users/223892014-09-22T02:37:33Z2024-06-14T20:20:14Z
<p>According to some <a href="http://jsperf.com/katex-vs-mathjax" rel="nofollow">benchmarks</a>, it seems that <a href="https://github.com/Khan/KaTeX" rel="nofollow">KaTeX</a> renders latex much more faster than Mathjax.</p>
<p>Is there any chance to use KaTeX in place of Mathjax?</p>
https://meta.mathoverflow.net/q/1820117MO-Hard QuestionsFrançois G. Doraishttps://meta.mathoverflow.net/users/20002014-08-05T18:39:51Z2024-06-26T01:04:45Z
<p>The term "MO-Hard" has entered the mathematical vocabulary, describing interesting questions that were asked on MathOverflow but haven't been answered in spite of efforts by many community members. Each one of these is a MathOverflow success story! Open problems are precious commodities that have driven mathematical research for centuries. While these are not necessarily at the same level as the Riemann Hypothesis and the Jacobian Conjecture, we should celebrate them and promote them!</p>
<p>While the <a href="https://mathoverflow.net/unanswered">unanswered tab</a> is a good way to find such gems, questions that have interesting partial answers do not appear there. In the same spirit as <a href="https://meta.mathoverflow.net/questions/617/best-of-mathoverflow">Best of MathOverflow</a>, let's collect MO-Hard questions here. Questions that still appear in the unanswered list are welcome since they might disappear any day. Comments, anecdotes and other remarks are also encouraged.</p>
https://meta.mathoverflow.net/q/86226Help cleanup tags!François G. Doraishttps://meta.mathoverflow.net/users/20002013-09-24T00:46:43Z2024-06-21T02:24:47Z
<p>This is meant to agglomerate tags that need (occasional or regular) cleanup. That is tags that mean multiple unrelated things and need to be separated into more specific tags. Please follow the examples below and discuss specific needs in comments or separate questions, as necessary.</p>
<p>Conversely, some subjects are scattered over several tags and there it might make sense to merge some tags and to create synonyms. Proposals for such can also be added as answers.</p>
<p>As of August 8, 2017, the length limit for tags went from 25 characters to 35 characters. So now is a great time to allow inconveniently compressed tag names to stretch out a bit...</p>
<hr />
<p>PS: If you want to cleanup these tags, please keep your rate down to a few posts per day so that your edits don't clutter the main page. Also note that merges can be done by moderators in one go without bumping questions. Thus, it is usually better not to carry out significant merges manually. (Here, "significant" means about four or more. Ask for moderator advice if you need to go beyond that.)</p>
https://meta.mathoverflow.net/q/65512When a MSE user is suspended, should the suspension apply to MO as well?Michael Zievehttps://meta.mathoverflow.net/users/304122013-08-20T23:50:10Z2024-05-30T02:01:02Z
<p>I'm just asking. When an MSE account is temporarily suspended to cool down, then the expected outcome is that the user would start doing the same things on MO which led to the MSE suspension. This has the effect of MSE dumping problem users on MO. Is this in MO's best interest?</p>
https://meta.mathoverflow.net/q/5724Option to migrate to CS TheoryFelipe Volochhttps://meta.mathoverflow.net/users/22902013-07-31T00:36:52Z2024-06-24T19:38:42Z
<p>We should add the option to migrate to <a href="https://cstheory.stackexchange.com/">Theoretical Computer Science</a> when voting to close. <a href="https://mathoverflow.net/questions/138217/what-is-meant-by-an-oracle-separation-between-classes-bpp-bqp">This question</a> is an obvious candidate. </p>
https://meta.mathoverflow.net/q/22332Requests for reopen and undelete votes for closed and deleted questionsAndrés E. Caicedohttps://meta.mathoverflow.net/users/60852013-06-27T05:52:17Z2024-06-26T22:19:01Z
<p>Since I expect this may prove rather useful, I'm blatantly purloining Asaf's <a href="https://math.meta.stackexchange.com/q/6424/462">question</a> from meta.math.se. </p>
<blockquote>
<p>Please post general requests for reopen votes as answers below.</p>
<p>Beware that "short" requests such as "request reopening of <<em>link</em>>" may be automatically converted to comments by the SE software, so you will need to say more, such as why you think that the question should be reopened.</p>
<p>Please do not use this thread to engage in debates on contentious matters (e.g. reasons for closure). That should be done in a separate thread - which can be linked to from here.</p>
<p>If a question is reopened then please put [REOPENED] at the start of the request (answer).</p>
</blockquote>
<p>Of course, each requested question may need some editing or other improvements before it is fit, and as indicated <a href="https://mathoverflow.net/questions/134562/set-theory-forcing#comment346706_134562">elsewhere</a>, this is desirable, and I hope may be expedited through this thread. </p>
<p>(Improvements on the phrasing are welcome.)</p>