# Questions tagged [exact-duplicates]

This tag is referring to the process of identifying and closing questions that are (abstract) duplicates of another question.

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### Encouraging duplicate hunters

There are more and more duplicates on this site, but sometimes it is time consuming to find an earlier source. Now, there is a variety of moderation badges for editing, voting, reviewing, raising ...
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### Improving the search system

When recognizing some questions as duplicates, sometimes it is difficult to find the original question one remembers. For instance, I recently saw a question asking to prove that \forall x\in(-1,1),\...
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### Help me find an original for questions like "Why $(-1)^{ab} \ne [(-1)^a]^b$ when $a, b, \in \Bbb R$?"

There are many questions that boil down to "why is it not true that $(-1)^{ab} = [(-1)^a]^b$ (or $z^{ab} = (z^a)^b$) for $z \in \Bbb C$ and $a, b \in \Bbb R$ (or $\Bbb C$)?" and, respectively, "...
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### questions asked over 100 times

I just saw another question with the limit of $(1 + 1/n)^n.$ A few months ago, somebody asked some other multiple repeat question, I wrote to check any of the last 137 times it had been asked. he ...
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### Should we close questions asking for hints as duplicates?

This question was inspired by this question Relationship between $\operatorname{ord}(ab), \operatorname{ord}(a)$, and $\operatorname{ord}(b)$, which I first came across while reviewing close votes. ...
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### Questions being reported as duplicates despite the "duplicate" being a generalization to the other

I am a second year math student and a fairly new user of this page so there's still a lot of things I don't understand both in the site and about maths. This is why I tend to ask a lot of questions as ...
394 views

### Should duplicate PSQs be closed as duplicates?

Usually once or twice a day in the close queue, I find a question that is a PSQ (Problem Statement Question) and also a duplicate. Sometimes another reviewer explicitly links to the dupe, other times ...
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### Meta-Meta question: Duplicate for previous question without actual real answer

So I was perusing the meta site, and I came across this closed link: https://math.meta.stackexchange.com/questions/20285/why-do-we-have-a-tag-called-stochastic-analysis The reason it was closed was ...
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### Request: When closing a question as duplicate, to show all the linked questions

When people post "This question is a duplicate of XXX", would it be possible for the selections shown when we decide to close a question as duplicate, to also show XXX? This could be easily done by ...
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### How to quickly find duplicate questions which are not exact duplicates.

Some moderators are able to find duplicate posts which are not exact duplicates. That is to say even in the case where the question is posed completely differently but the solution uses similar ...
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### Marking questions as the originals for duplicates

When a question is closed as a duplicate, the ideal result is presumably that the questioner, potential answerers and future visitors will head off to the linked question and that any new answers will ...
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### Should a closed question be reopened if it gets a duplicate?

This question How do you prove that $n^2-1$ is composite when $n>2$? was closed as a duplicate. That was the right outcome, as opposed to, you know, "off-topic." But the question it's a duplicate ...
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### About removing the reputation of suggested-edits and put that reputation to find duplicates

In the context of the current situation, and also, time ago situation, in part for the duplicate-questions on math.SE, Could it be that, perhaps temporarily, the +2 reputation for the suggested edits ...
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### Solution verification questions and duplicates: proposal for discussion

When a user posts a (solution-verification) question on a problem (often a standard problem), I tend to not vote to close as a duplicate, since the user is asking for feedback on their particular ...
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### Asking a question which is pretty much a dupe

I want to ask a question, but it is basically a duplicate of a (5 year old) question already asked here and that question doesn't have an answer. Morally, any good answer to that question would be an ...
341 views

### Questions that show no effort to find existing similar questions a.k.a. abstract duplicates

EDIT: After amWhy brought the term "abstract duplicates" to my attention in the comments below, I thought some tidying-up was in order. The original body of the question is mostly intact below; I have ...
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### "Math Processing Errors" in the Close as Duplicate Preview

I see plenty of "Math Processing Errors" in the close as duplicate preview:
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### Duplicate shows as "on hold" in favourite list

Today, I favourited this question on my phone in order to hunt for a duplicate later. After the question was closed as a duplicate, I saw the following in my favourites list: As you can see, it is ...
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### I think I made a bit of a mess, how to solve it

In a short time I asked three questions about more or less about the same subject: which surfaces have (for a large area) a constant negative curvature? "Hyperboloid like surface" as ...
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### Closing as duplicates for migrated questions.

This is mostly an announcement in case anyone wondered what happened to these two questions: https://math.stackexchange.com/questions/98121 https://math.stackexchange.com/questions/98162 Question 2 ...
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### A possible solution to reduce answering of duplicate questions

The whole point of people answering duplicate questions which are duplicates without checking if similar queries exist before are because they will get points if they do so. So, the reason why people ...
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### Database of abstract duplicates displayed when asking question/clicking on tag

The following question came up today: Prove $5a^2 ≠ 3b^2$ for all non-zero rational numbers $a$ and $b$ This is surely an abstract duplicate if not an actual duplicate. Yet as I intended to indicate ...
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### Duplicate question with a not satisfying answer

What should I do if I have a question that's been already asked and answered years ago but I don't get the answer? Should I ask a new question and link the old one?
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### How to correct a duplicate flag?

I initially flagged this question as a duplicate of another question, but then realized the other question was not exactly a duplicate. I then found a better (exact) duplicate, and tried to correct ...
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### Appropriate way to place sound arguments when reopening a duplicate marked question

The possibility to reopen a duplicate marked question is a nice feature. This action is usually based (at least I do hope so) upon sound arguments. Is there a way to attach or combine these ...
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### Plenty of [Math Processing Error]s before and after selecting duplicate in review queues

Since this is already more than six months this has been reported inside the Mathematics new site theme is live topic, and yet still not fixed, I've decided to put this one separately. This happens ...
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### Editing the list of abstract duplicates

I'd like to add some content to the meta post List of Generalizations of Common Questions. The entry will be under Probability and is going to be titled something ...
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### How can I benefit from my question being marked as a duplicate?

My question got recently marked as duplicate, and I agree on it. I understand marking a question as duplicate as useful in the following sense: It keeps Math SE clean. It provides me with a kind of ...
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### How to find duplicates?

I am facing a basic problem: I do not know whether I am being silly or not, but often when I look at some questions, I feel that I have seen that before (if they have special structures like this one) ...
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### LaTeX a jumbled mess when flagging as a duplicated

Is it normal for the LaTeX to be a jumbled mess when flagging as a duplicate? In case it isn't all systems, I am on a Linux system with Firefox 34.0.
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### Moderators: please straighten out loop in "duplicate of" graph

Recently a user asked Is "applying similar operations from left to right" a convention or a rule that forces us to mark one answer wrong? , which is a duplicate of 6/2*(1+2) is 1 or 9?; they ...
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### Why these questions are not duplicates?

There are these two questions: (Theoretical) Multivariable Calculus Textbooks References for the multivariable calculus I was wondering why no one has marked them as duplicate of each other. Or is ...
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Suppose there is a question: How do you prove invariance of domain? which is answered in a complete, elementary manner. Now, suppose another question comes along ...
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### Where should I post my answer?

Yesterday I answered this question: What should be the technique applied here to get a equation of just $x$ to solve for $\cos x?$ At the time I answered, the question had some other answers. The ...
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### Redundant overlapping expressions in review queues when closing as duplicates

Since this is already more than six months this has been reported inside the Mathematics new site theme is live topic, and yet still not fixed, I've decided to put this one separately. If you go to ...
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### Title of linked question messed up when it includes MathJax

I've just flagged a question as duplicate ( it was already deleted) and the link to the original one appears broken - not the link itself but the title: If this helps, the source of the title of the ...
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### What Counts as a duplicate Question?

Imagine somebody who is studying differential equations. He comes to the section on first order linear differential equations. He attempts to do the first problem in the section, but he comes up with ...
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What to do with answers to questions which are obvious and exact duplicates of existing questions? I'm talking about this review I recently did. The answer was to one of those limit/inequality/...
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### Should we be more harsh on questions with answers elsewhere?

In this question and many others which I have seen, the question is an exact copy with little changes to itself on quora or other sites. I left a comment on the post with reference to the quora post, ...
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### Merging questions with multiple duplicates (not a duplicate)

21 days ago from August 15, I asked my first question which looked like $a_1=1 ,\space a_{n+1}=a_n+\dfrac{1}{a_n}$ The question was marked as a duplicate by me undisputedly. But as being observant ...
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### Is context significant in determining if a question is a duplicate?

I was looking at a pair of questions: Sum of random numbers and e constant And Expected number of (0,1) distributed continuous random variables required to sum upto 1 The rules of Math ...
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### Should a canonical for common errors be created?

Should MSE create canonical posts for common "non-trivial" errors (as in not arithmetic or typographical-esque errors)? One example is freshman's dream, which is an erroneously calculation of \$(a + b)^...
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### Duplicate question notice checks closed duplicate for answers instead of target

In March 2016, Exact duplicate doesn't require answer but claims one exists was implemented, which purported to show a different notice if the duplicate target has had no answers. However, for ...
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### On duplicate questions

Sometimes I've noticed (specially on older questions), that the duplicate tag often sends a link to a question that indeed is a duplicate, but has no answers or has only suggestions, meanwhile the ...
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### Why does a question marked as duplicate get more views than the original?

As an example case, there's this question, slated to be deleted, which is marked as a duplicate of this question. Even though the latter one is more general and has been around longer, it has ...
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### Duplicate question on relation between gradient and Jacobian

I am a newbie to multivariable calculus so I am not sure whether I should be bringing this up on Math Meta or not but are these two questions duplicates and if so why they have not been marked ? ...
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### A few high quality duplicates

Suppose we have a small number of very close duplicates on some particular question. Suppose also that the questions are high quality and have high quality answers - at least, as measured by the ...
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### Metrics for questions

Lately I had a case that one of my questions was marked "as an exact duplicate". Projection, rotation and skew-symetry in N-dimensional space Commutativity of projection and rotation But what the ...
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