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Questions tagged [exact-duplicates]

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

16
votes
3answers
611 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 ...
8
votes
1answer
373 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 ...
18
votes
1answer
415 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", "...
2
votes
1answer
65 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 ...
2
votes
1answer
94 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 ...
9
votes
1answer
196 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 ...
2
votes
1answer
71 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 ...
13
votes
0answers
237 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
votes
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)^...
3
votes
1answer
174 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
vote
1answer
119 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 ...
2
votes
0answers
55 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 ...
2
votes
0answers
63 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
votes
0answers
76 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
votes
1answer
51 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
votes
2answers
389 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,...
2
votes
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 ...
30
votes
1answer
639 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 ...
12
votes
0answers
332 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
votes
0answers
143 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
votes
1answer
115 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 ...
5
votes
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 (...
7
votes
0answers
97 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
votes
0answers
76 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
votes
5answers
748 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
votes
2answers
385 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
vote
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
votes
1answer
65 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
votes
0answers
163 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 ...
23
votes
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, "...
14
votes
6answers
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 ...
-11
votes
1answer
210 views

What's going on with my flag?

While waiting for Alex Gruber to recharge his batteries, the moderation is working slowly. For instance, on September 3 I've voted to close this question as a duplicate. I was certain from the very ...
14
votes
1answer
212 views

What's the difference between duplicate flag and close duplicate flag?

What's the difference between duplicate flag and close duplicate flag? When I want to flag something as duplicated there are two ways: Flagging as a duplicate: Flagging as should be closed → ...
1
vote
0answers
60 views

how to close a duplicate of a stackoverflow question? [duplicate]

The question Finding third side of a minimal triangle appears to be essentially a duplicate of https://stackoverflow.com/questions/22441855/triangle-circle-enclosing-a-set-of-points . The ...
0
votes
0answers
104 views

Are these two questions really duplicates?

First, I'd like to appologize if this similar questions were already made. I've tried to look for something similar and the nearest I found was this. I've even looked the two examples given in the ...
4
votes
3answers
459 views

What to do in case of unsuccessful duplicate close vote (or flag)?

Consider a situation when a user votes to close a question as duplicate (or flags it as a duplicate if they do not have sufficient rep to cast close votes), and then the post is not closed. If the ...
3
votes
1answer
152 views

Why my duplicate flag is declined?

Aren't these questions similar? Factorial Proof by Induction Question: $ \frac1{2!} + \frac2{3!} + \dots+ \frac{n}{(n+1)!} = 1 - \frac1{(n+1)!} $? Prove if $n \in \mathbb N$, then $\frac{1}{2!}+\...
5
votes
2answers
280 views

What happens when I flag as duplicate?

What happens when I flag as duplicate? Usually they are closed by others, but sometimes I saw that the flag was helpful but nothing happened to the question. Are duplicate flags shown to some special ...
18
votes
5answers
963 views

How close a match we need to close a recurring question as a duplicate?

An hour ago I closed a question as a duplicate of an, in my opinion appropriate, generic question. Two gold badge holders have since expressed disagreement with my decision, and the question has since ...
16
votes
2answers
614 views

This question is an exact duplicate of: Page Not Found

I stumbled upon this question which was marked as a duplicate, and rightly so as the OP had realised himself in their comment. Checking out the question that it's an exact duplicate of leads to this. ...
4
votes
0answers
62 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) ...
2
votes
0answers
84 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 ...
6
votes
2answers
454 views

What should I do when my question is marked duplicate?

Is it advised to delete the question? Or should I just leave it alone?
2
votes
0answers
49 views

Should questions be marked as “duplicate” if answered before, but a possibly better/simpler approach now used?

How to prevent possibly better/simpler approaches to a previously answered question from getting buried as a duplicate question ? Number of ways to arrange identical coins in a ring
8
votes
1answer
131 views

Exact duplicate doesn't require answer but claims one exists

This question was (rightly) closed as an exact duplicate: https://math.stackexchange.com/questions/1717381. (If I'm not mistaken, only moderators can do that.) The message at the top differs from the ...
4
votes
0answers
63 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....
2
votes
0answers
115 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, ...
14
votes
1answer
427 views

Answering my own new and more detailed question rather than an existing one

Recently I have posted this question: Functions that preserve asymptotic equivalence. I searched MSE and MO sites for related questions before asking, but didn't succeed, my bad. After few days, I ...
1
vote
0answers
70 views

Closure as duplicate navigating in a circle

I was reviewing the close votes today when I came across this question , for identification purpose, lets call this $\mathbf{A}$. Someone had given it a close vote, marking it a duplicate of this ...
2
votes
0answers
66 views

Reopen-reclose request

Long ago, I asked this question. It was never a duplicate of this one, since the question was pretty different, and when the question changed it still had a different viewpoint, yet it was closed as ...