Questions tagged [exact-duplicates]

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

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81
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10answers
7k views

Coping with abstract duplicate questions.

Any longtime reader cannot help but notice that we get many abstract duplicate questions, e.g. this recent question on partial fraction computation, which is not essentially different from many other ...
9
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0answers
220 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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3answers
361 views

There needs to be a clean way of dealing with abstract duplicates.

(Edited) I found that these four question are very similar: (One) (Two) (Three) (Four), and are abstract duplicates in my opinion. However each question is "slightly" different then the next, ...
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0answers
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What is the {real} meaning of duplicate question?

edit: I want to know the rules of this site. I no longer care about answer and that question. Find the least value of $ \sec^6 x +\csc^6 x + \sec^6 x\csc^6 x$ First I asked this question because my ...
13
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4answers
746 views

downvoting because of duplication?

This question has five downvotes, and was closed as a duplicate of a question with 25 up-votes. Should one down-vote a question merely because of duplication? There's no mention of anything wrong ...
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7answers
1k views

The duplicate thread

This thread is intended to help with closure of duplicates. The main use case are situations where a first attempt at duplicate closure was not successful.1 The creation of this thread was decided ...
8
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0answers
284 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?
13
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1answer
341 views

On the correct procedure after answering a quadruplicate question

Okay, so I just answered this question, and after answering read the "related" section and noticed that the answer had already been asked several times: 1, 2, 3, 4. Now I am not sure what to do, ...
7
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0answers
91 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 ...
4
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0answers
55 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 ...
13
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0answers
192 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 ...
12
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1answer
156 views

Strange link text in a possible duplicate

I've just flagged the question Indefinite integration $\int\frac{(2x^2)}{2xcos(2x)+(x^2-1)(sin(2x))}$ as a possible duplicate of another question posted by the same user. In the link text, a strange ...
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0answers
21 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 ...
5
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1answer
97 views

Closing a poor question as off-topic or as a duplicate?

Few times I've faced the following dilemma: To vote for closing a poor question as off-topic or as a duplicate of another one (sometimes equally poor)? The last example is this: https://math....
23
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2answers
358 views

A hierarchy of duplicates - which questions generalise other questions?

I think the site would benefit from a hierarchical structure to the duplicate question functionality, indicating which questions generalise others. I was contemplating duplicate questions last night ...
3
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0answers
94 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 ...
6
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0answers
215 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 ...
18
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1answer
1k views

I voted mistakenly to close as duplicate. When I realised my mistake, my comment explaining why was deleted.

I refer to this question: Comparing logarithms with different bases. Over-hastily, I flagged it as a possible duplicate of How to compare logarithms $\log_4 5$ and $\log_5 6$?. I also thought it was ...
20
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3answers
765 views

Should duplicate questions be deleted?

Lately, I came across several suggestions for deletion of questions simply because they are duplicates. In my opininion: If the question is somehow a bad question, then it ought to be deleted, and so ...
18
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1answer
422 views

Should we have a canonical question on transitive / symmetric / reflexive relations?

It seems that we fairly regularly get elementary questions of the form: "Does a relation that is [A] and [B] have to be [C]?" where [A], [B] and [C] are some permutation of "transitive", "...
8
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1answer
384 views

Can't close duplicate bounty questions with exactly same “accepted” answers

This question is the exact duplicate of this question and both were answered by the same user with the exact same answer (Although he has mentioned it as a duplicate in his second answer and the ...
2
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1answer
72 views

Near-duplicate questions, but both questions are effectively blind to each other.

On the question here, it was eventually discovered that this question was a duplicate; however, if we go through the same process that the OP has done and craft a question as they have (with the same ...
9
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1answer
200 views

Should questions about special cases of a more general problem be marked (closed) as duplicate?

While browsing new questions asked on this website, it is common to find some of them as duplicates of older ones, and it is then generally productive to indicate it as such, and redirect the OP to ...
1
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1answer
95 views

Does it make sense to flag a question as duplicate if it already has an answer?

I guess the purpose of flagging a post as duplicate is to prevent people from taking the effort to answer a question that has been answered before. So does it make sense to flag a question if someone ...
2
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1answer
73 views

“This question may have an answer here:” banner for the Author

The duplicated question flag has been correctly raised for my question. There is a banner on my page asking for some action on my part. How do I respond? The banner offers me two inappropriate ...
14
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0answers
244 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 ...
2
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0answers
60 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)^...
2
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0answers
59 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 ...
3
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1answer
214 views

How can a proof-verification question be closed as a duplicate? [duplicate]

Consider a question of this type: “My task is to prove […]. Here's my attempt: […] Is my approach correct?” I've seen several questions like this being closed as duplicates. ...
1
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1answer
122 views

Cannot delete a question after deleting its duplicate

Thanks to a recent comment in CRUDE, a duplicate question from a new user was found and deleted. However, I can't cast a deletion vote on its duplicate target, which has been closed and inactive for ...
11
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0answers
131 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 ...
2
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0answers
67 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 ...
2
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0answers
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 ...
2
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1answer
52 views

Could I flag a possible duplicate to a question asking for a proof when I had already asked about the correctness of mine?

That is, I asked before to check the correctness of my proof of that statement, and the correctness has been confirmed. Could I now flag a question asking for the proof of it as "possible duplicate" ...
6
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2answers
392 views

Should questions ever be marked a duplicate of another duplicate?

Should questions ever be marked a duplicate of another duplicate question? Specifically, I'm looking at these three questions, each one marked as a duplicate of the next: ?+?+?=30 (1,3,5,7,9,11,13,...
21
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2answers
621 views

How do you search for duplicates?

Sometimes I am really surprised how fast are the duplicates of new question found, given that we have vast amount of questions here. I hope posting this question here can be useful and can lead to ...
5
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1answer
104 views

Merging a migrated duplicate rejects the migration

Migrated questions get rejected if they are closed on the target website, with the exception of duplications. Earlier today I saw that a question was posted here and on MathOverflow simultaneously (...
30
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1answer
641 views

Is it acceptable to post a “better” version of an existing question?

Situation: Lets say there was an interesting question, but: It was poorly written (e.g. language, formatting, missing assumptions). It was posted many day ago but got only a few views. It received ...
2
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1answer
126 views

How to ask the question which aren't ask before

Many times when I ask a question I found that it blocked as it is duplicate. But I don't know which question is ask before. So how can I understand that the question is duplicate or not?? Please help ...
11
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0answers
335 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 ...
2
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0answers
150 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/...
4
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1answer
136 views

Duplicate of unanswered question

I have read very similar questions, but not exactly this: a new question is a duplicate of an older question. However, when I try to flag, I get the message This question does not have an upvoted or ...
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0answers
98 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 ...
2
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0answers
79 views

Closed as “Possible Duplicate” [duplicate]

This question was closed as a "Possible Duplicate," which confuses me because I've never seen that before once the question has been closed.
27
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5answers
762 views

What if the duplicate has a better answer than the original?

I have recently asked a question (The original did not turn up in my search): Show that there are infinitely many powers of two starting with the digit 7 which was marked as a duplicate of: Starting ...
13
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2answers
393 views

What to do with two old questions that are clear duplicates but not marked so? [duplicate]

Recently I stumbled on the following questions: 1. Proof that a trigonometric function of a rational angle must be non-transcendental 2. Is a trigonometric function applied to a rational multiple of ...
1
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0answers
55 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 ? ...
2
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1answer
66 views

Should I delete my question if I find out that it's a duplicate or near duplicate?

Should I find out (perhaps through the help of some other user) that my question or something very similar has already been asked, what should I do? Should I delete it? Should I post a pointer to its "...
3
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0answers
176 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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0answers
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, "...