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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33 votes
0 answers
351 views

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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24 votes
0 answers
1k views

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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24 votes
0 answers
378 views

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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23 votes
2 answers
444 views

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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18 votes
0 answers
642 views

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 ...
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18 votes
0 answers
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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18 votes
1 answer
340 views

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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16 votes
0 answers
108 views

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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14 votes
0 answers
468 views

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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  • 1,377
14 votes
0 answers
205 views

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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14 votes
0 answers
248 views

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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  • 14.3k
13 votes
0 answers
331 views

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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13 votes
0 answers
625 views

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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13 votes
0 answers
494 views

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 ...
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11 votes
0 answers
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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10 votes
0 answers
124 views

"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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10 votes
0 answers
85 views

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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10 votes
0 answers
495 views

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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10 votes
0 answers
137 views

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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9 votes
0 answers
112 views

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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9 votes
0 answers
235 views

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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8 votes
0 answers
290 views

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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  • 87
7 votes
0 answers
87 views

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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7 votes
0 answers
331 views

On reposting a good answer from a duplicate question

I'm talking about this question. This question is closed as a duplicate. An user commented, under an answer, that they think this answer is the best solution and want the author to repost the answer ...
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7 votes
0 answers
126 views

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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6 votes
0 answers
141 views

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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6 votes
0 answers
235 views

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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6 votes
0 answers
105 views

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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  • 28.1k
6 votes
0 answers
199 views

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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  • 6,035
6 votes
0 answers
129 views

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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4 votes
0 answers
96 views

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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4 votes
0 answers
229 views

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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4 votes
1 answer
169 views

How should duplicate questions with more information be handled?

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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3 votes
0 answers
281 views

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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3 votes
0 answers
83 views

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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  • 13.3k
3 votes
0 answers
100 views

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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3 votes
0 answers
99 views

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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3 votes
0 answers
163 views

Answers to obvious duplicates

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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2 votes
0 answers
626 views

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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2 votes
0 answers
80 views

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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2 votes
0 answers
63 views

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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2 votes
0 answers
63 views

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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  • 4,478
2 votes
0 answers
67 views

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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2 votes
0 answers
79 views

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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2 votes
0 answers
77 views

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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  • 18.3k
2 votes
0 answers
62 views

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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2 votes
0 answers
188 views

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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  • 28.4k
2 votes
0 answers
92 views

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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  • 7,586
2 votes
0 answers
119 views

Several questions, same problem, same user

I have searched Meta for several questions same problem same user. There were (1) quite (2) a few (3) related (4) titles, but these cover slightly different scenarios and do not seem to help here, ...
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