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Suppose you wrote a question asking to find where your mistake is. It might be possible that there are 2 answers - one showing your answer and other showing another very beautiful method and OP doesn't want to accept any. It is more likely that the beautiful method will get upvote and by your feature that answer will be accepted however the other answer ...


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Please reopen https://math.stackexchange.com/q/4200541? Mike Earnest's comment appears to jump the gun. This seems like an example of the XY problem. You are asking about how you can use method X to solve problem Y, when method X is actually useless for problem Y, and all you actually care about is solving problem Y. Because the literal question "How ...


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To summarize the suggestions in your post and the comments, I suggest we change the excerpt as follows. Use this tag for questions about source-coding and channel-coding in information theory, error-correcting codes, error-detecting codes, and related algebraic and/or combinatoric constructions. This tag should not be used for questions about programming. ...


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Please merge these overabundant requests for Multivariable Calculus textbooks? Don't hesitate to add other duplicates to this post. Reference for multivariable calculus Multivariable Calculus books similar to "Advanced Calculus of Several Variables" by C.H. Edwards Second Text for Multivariable Calculus Teaching myself multivariable calculus A ...


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As explained in the comments, you can find things like this using SEDE. Here is a query looking for the most upvoted comments on the main site and on meta. And here is a similar query for Stack Overflow. (SO has many comments - to make the query faster I have added the condition to check only the comments above certain score.) You have also asked for top ...


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Putting my Product Owner hat on for a moment then, since this is a feature request there are (the usual) things missing$^1$. Who will be enabling this test? There is a division of labour already: StackOverflow and its employees own the code to the site, and presumably they will need to be asked/persuaded to provide an interface for this test. If they ...


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It is important to understand that "closing as a duplicate" can be done in different ways. For example, a thing that can be done in such a case is to explain how the duplicate applies. Note the comment by the user that closed it: "See the linked dupe for how to find all roots of $\,n^2\equiv n\pmod{1000}\ \ $" This comment translates the ...


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Yes your behaviour is right. You can definitely accept your answer. It is allowed and will help future readers to get more knowledge. However if the other answers have helped you do upvote them and thank them in comments. It should be noted that one does not get any reputation for accepting own answer. Refer these links for more examples- Accepting your own ...


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You need not to worry about this. Someone who has deliberately downvoted most of your posts but you need not worry. This is serial voting and your reputation will be restored to you by 5 am UTC. If the 24 hours have already passed and the suspicious votes have not been reversed, you can then flag one of your own posts for "in need of moderator ...


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The following meta post is obviously clear and detailed; however, since it contains some criticism a few people dislike, it was closed wrongly (This reminds me of Galileo affair): Can busy people moderate the community well? Let us not allow a few users to dominate this community.


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The help page says, among other on-topic areas there are: Understanding mathematical concepts and theorems. Mathematical problems such as one might come across in a course or textbook. Any modern "intro to proof" textbook has a nontrivial number of questions asking students to analyze incorrect proofs, precisely for the purpose of understanding ...


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experimentally change the width parameter to find the image size that you regard as the most suitable Be aware that, in general, using absolute sizes can produce something that looks good on your screen, but awful on other people's. I'm looking at this on a 4K monitor, so 200px is going to look too tiny (that's only 5% of the width of my screen), while ...


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Here's your answer (it seems to be a style file may have gotten mixed up?).


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I've edited the question in question to have the words "codomain" and "range". Based on the comments here, there is no good way to definitively answer this question. Some say that "codomain" is a word only introduced in the context of category theory, whereas some have seen it sneak into the vocabulary of earlier curriculum. ...


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To quote from the comments: I think the issue is instead either ignorance or apathy (many new papers still write $<x,y>$ for inner products, after all...) The (mis)use of "$-$" instead of a hyphen, or the use of < and > instead of \langle and \rangle (or other more appropriate alternatives) is relatively commonplace, and the best one ...


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Reopened Please consider reopening Example of a map of coverings which is not a covering map, if the base space is not locally path-connected. This is a natural question asking for an example to show that a certain technical hypothesis is needed in a well-known basic theorem in the theory of covering spaces. The original version of the question was missing ...


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Since this policy was announced, we have witnessed a shift in attitude from the moderators. No longer are users trusted to make their own decisions on what can be posted and what cannot, given their experience on this site. And no longer does SE respect and value its members, but rather uses intimidation and retalitatory measures such as timed suspensions ...


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Ya it was a bug. Now the bug has been fixed as claimed over here. As you can see the edit history the profile pic error has just been sorted 1 hour ago. Now you can see community's real pic/profile pic


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Honestly, this kind of question does not seem to make sense to me. Every fake proof does something invalid along the way, from which point you could deduce anything and everything, not just a single false conclusion. So if you actually allow this kind of question (despite it already being opinion-based and hence intrinsically off-topic), you would also have ...


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Undeleted Please undelete This question I asked and answered, and its answers. It is intended as a sequel of this question. Edit the question if possible. Thank you.


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TL;DR Addressing the question at the end of your post, the FAQ is intentionally left vague because (a) the guidelines are, to an extent, network-wide boilerplate without a lot of room for per-site customization, (b) the FAQ is not easily changed, and (c) community standards are meant to evolve over time and the FAQ is not meant to interfere with shifts in ...


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To answer the first question, the acronym (or some might prefer initialism) PSQ, is derived from Problem Statement Question. In its purest form it is a question post that only contains the statement of a problem, in a form that is frequently found in exercise sections of textbooks, assignments and alike, e.g.: Prove that $\sum_{i=1}^n i= \frac{n+n^2}{2}$ ...


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In my opinion, you should be quicker to upvote than to accept. You can undo an upvote and you can undo an accept, but, speaking only for myself, I'm more willing to see an upvote reversal kindly than an accept reversal. Upvote just means you think the answer is good. Accept means that you think it's the best answer. And some people on here seem to take ...


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First of all I am answering this question with the best of my knowledge. This answer fully includes my opinion. Now let us take this question of mine Finding length of diagonal in parallelogram given two sides and other diagonal . I had posted this question and received multiple answers. When such situation arises remember you should choose the answer that ...


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The almost opposite situation happened to me recently: What to do when an answer I'm about to accept disappears? - Android Enthusiasts Meta Stack Exchange Someone posted a simple link-only answer to my question, and it was appropriately deleted shortly after. The irony is that it is the only answer I received, and it did provide a solution to my problem, one ...


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While I'm not the most active on this site, my experience on other SE sites would suggest a simple piece of advice: upvote answers that are helpful, and downvote answers that are harmful. You get a lot of latitude to decide what "helpful" (or "harmful") means, but an answer that points you in the right direction enough that you can find ...


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Reopened, Re-closed (by a mod), and Reopened again with context edit reinstated Please consider reopening Any criteria for a category to have all connected limits?. This is a very natural question about whether there is an analogue of certain well-known basic theorems in category theory in a less well-known context. The context in the original question was ...


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I don't know about a canonical one, but here's one I wrote a few years ago, perhaps more suitable for an analysis student than a beginning calculus student. But the language is extremely plain and, I think, clear: Understanding the definition of the Riemann Integral It does at least have the pictures showing a lower sum and an upper sum and why they will (...


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Since nobody has pointed out an existing one, I hereby declare the question What's an intuitive explanation for integration? to be the canonical such question, and ideal target for duplicate flagging, henceforth.


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It's a good question, and one I have no universal response to. I dislike the flat "Yes, that's correct" response though I have used it. It's effectively meaningless. At best it is Proof by Authority. At worst? Well, many users here are heavily credentialed but it's all anonymous. I have seen many instances in which people confirmed entirely ...


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Undeleted, reopened, closed again Please consider undeleting my question: Is Kumar Eswaran's proposed proof of the Riemann Hypothesis correct? I understand that it was closed on account of being too broad for math.se. However, the existing comments indicate that a clear answer should exist. Moreover, the question is in relation to a somewhat significant ...


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You asked about sandbox compared to "using the normal draft mechanism". I hope I understand correctly that by this you mean that you mean feature of Stack Exchange software that if you start to write a question (or an answer) and you not submit it, you can find it in the same place again later. (This feature was announced here: Allow questions to ...


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My experiences with having questions closed is that it can be arbitrary, with too much authority given to individuals whose rankings are sufficiently high to be able to cause a question to be closed. Perhaps annotation flagging problems with questions could be extended such that if enough time goes on without raised issues being corrected, possibly combined ...


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undeleted, reopened Please undelete the following question: Union of closed convex sets The question and (my - to be fair) answer was highly upvoted. The question was closed/deleted for lack of context. I edited the question to include some context: The claim seems to be true in situations one can immediately think of. It is one example of a claim on convex ...


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Want to ask a homework question but don't know what the rules are? How to ask a homework question right sidebar self


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What will happen when I write a comment longer than 600 words? As such nothing happens. When you will write the comment longer than 600 words and click on add comment it will display a message "Too long by $x$ characters" where $x$ represents total characters minus 600. Here is a refrence what happens when I enter something longer than 600 ...


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good question. First of all, we will never be able to crack down, as far as I can see, on people not doing the work or on someone cheating. We cannot enforce people coming on here and seeking out help on math problems on say take-home exams or contest problems, that surely they pledged to be doing on their own. At least I don't see it. So I'm not seeing how ...


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Here is a thought. If you, an expert in a topic, see a problem-statement-question that is interesting, and if you know this question is not a duplicate, and if you judge that adding some context would increase the value of the question to MSE (in part by increasing the chance that someone would be willing to write a good answer before those pesky non-experts ...


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So the question is up and running here. It has two up votes and 20 views as of the time of writing (and 5 up votes and 51 views after some more time), and seems to be good! Criterion that I requested for fulfillment from the new question, which were heeded, include : The source, which was specified. It was found by the OP. A reference to the old question. ...


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