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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.

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3answers
379 views

Should we merge the questions on “self-studying abstract algebra”?

There are currently (as far as I know) three community wiki questions with largely the same premise: book recommendations for self-studying abstract algebra. They are Good abstract algebra books for ...
11
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2answers
401 views

I wrongly flagged a question. What to do?

I just wrongly flagged the question Is this correct? $rH=Hr^{-1}$ as a duplicate of the question Show that the set $\{r^{-1} : r\in R \}$ contains exactly one element out of each right coset of $H$.. ...
11
votes
1answer
273 views

Duplicate Titles needing improvement and/or closed as duplicate

Inspired by a similar question on meta.stackoverflow, I just did this database query on math.se, and found 81 pairs of questions with totally identical title. (Ordered pairs where id1 < id2, ...
11
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3answers
358 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, ...
11
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1answer
292 views

Proposal to create a canonical “Solve this linear congruence” question & answer

I propose that we create a generalized question about solving linear congruences, and close all future questions on this topic as a duplicate of it. This strategy has been employed several times for ...
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 ...
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 ...
10
votes
1answer
376 views

Exact duplicates of questions posted on MO

I wonder why we can't declare a question posted on MSE (like this) an exact duplicate of a question posted on MO (like this) and viceversa? (I'd find it useful if we could do this.)
10
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1answer
143 views

When, and how, to suggest merging of questions?

Background Just today, we had the following situation: Proving by induction that $n^{n+1} > (n+1)^n$ for $n \ge 3$ Prove by induction that for all $n \geq 3$: $n^{n+1} > (n+1)^n$ Usually, I ...
10
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1answer
257 views

Canonical “-1 = 1” answer?

There are quite a few questions which involves "showing" $1=2$ or $0 = 1$ or $-1 = 1$ via incorrect algebraic manipulations of $i = \sqrt{-1}$. Does anyone know if there is a "canonical" question/...
10
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3answers
224 views

When are questions the same?

This is a rather philosophical question, but reflects the fact that essentially the same question can be asked at different levels of mathematical sophistication and with differing motivation. Here ...
10
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1answer
545 views

Should identical answers on questions which are abstract duplicates of each other be allowed?

Let's say that a question is posted, asking how to find $$\sum_{k=1}^n2k^2.$$ It is proposed that the question be closed as a duplicate of a much older one, asking how to find $$\sum_{k=1}^nk^2,$$ but ...
10
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0answers
493 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 ...
9
votes
2answers
199 views

Can one avoid gold badge superpowers by temporarily removing tags?

As described here, earning a gold tag badge has the side effect that one's votes to close questions in the tag as duplicates become immediately binding instead of going through the usual voting ...
9
votes
1answer
259 views

Loop of duplicate posts

These two identical questions were asked by the same user (the first one was migrated from MO actually): https://math.stackexchange.com/questions/582151/lrs-over-finite-fields https://math....
9
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2answers
331 views

Handling near duplicates

What is the best way to handle near duplicates? Here are two examples of what I mean. This question asks about zero divisors in commutative rings. However, this older question asks a slightly more ...
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 ...
9
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2answers
501 views

“Isn't this set countable” big list, and other abstract duplicate big lists

I'm sick and tired of seeing those almost the same, but usually not quite duplicate questions asking something like How is this set uncountable? We can put it in bijection with the natural numbers ...
9
votes
1answer
246 views

Marking a question as duplicate even when the question has no answer

I recently asked this question on this meta. However, it was marked as the duplicate of this question. But the latter question has had no answer and even less number of comments than the first one. In ...
9
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0answers
105 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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0answers
83 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 ...
9
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2answers
432 views

Duplicate question that deserves an answer anyway

I recently voted to close a question about the limit of $\sin x/x$ because it's a duplicate of a very popular question. However, user Hayden told me in a comment that "I think the main issue here is ...
8
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1answer
382 views

Avoiding duplicates

I was wondering if I could ask a question on meta whether some question is on the site or not. I'm asking this since sometimes one might ask a duplicate question which he/she searched for and didn't ...
8
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1answer
480 views

User thinks their question was closed when it wasn't

At A subset of $\Bbb R^p$ is open iff it is the union of a countable collection of open balls the OP complained: Well lemme just say that marking this as a duplicate is a little unfair.. But the ...
8
votes
1answer
383 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 ...
8
votes
1answer
140 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 ...
8
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1answer
209 views

Closing duplicate questions by the same poster

To close a question as duplicate it is now suggested that the original question should have an answer "this question has been asked before and already has an answer". Another circumstance arises quite ...
8
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2answers
323 views

Duplicate banner breaks LaTeX

On several recent occasions, after closing a question as a possible duplicate the automatic banner breaks the $\LaTeX$ requiring manual intervening. I don't recall it was like that before, and I ...
8
votes
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?
8
votes
0answers
124 views

Clarification of what should be closed as a duplicate [duplicate]

Until today the word "duplicate" was clear to me, or so I thought, but I have just been confronted with the following situation: there is a question A from 2011 (with an accepted answer) and one other,...
8
votes
0answers
48 views

Escape brackets in titles of questions when voting to close as a duplicate [duplicate]

When you vote to close a question as a duplicate, the software automatically puts a comment looking like Possible duplicate of [Duplicate title](Duplicate link).. ...
7
votes
1answer
313 views

Abstract duplicate?

I have noticed two questions here and here which are nearly identical in nature. These questions ask to show that given any $n+1$ integers, there exist at least two integers whose difference is ...
7
votes
2answers
287 views

What's the point to close a question as a duplicate after an answer was posted?

For instance, I've voted to close this question as an exact duplicate, but now there are two answers added and one is already accepted. What's the point to close it now?
7
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2answers
316 views

Possible Duplicate notice, sans closing, is not attributed nor in the Revisions list

"Possible duplicate" warning after the first vote to close as a duplicate, is a new behavior. But it has some side effects: it does not appear as an action in the revisions list of a posting, the ...
7
votes
1answer
208 views

Duplicate “Possible Duplicate” box

Amusingly, the question Is there a subfield F of the complex field with [C:F]=3?, which was closed as a duplicate, has two "Possible Duplicate" boxes, each indicating the same question as the possible ...
7
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0answers
90 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 ...
7
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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 ...
7
votes
0answers
116 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 ...
6
votes
1answer
464 views

What should I do when I find circularity among duplicates?

Occasionally, when trying to vote to close some question, you get the error message: ...
6
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2answers
326 views

How to close a question as “This question already has an answer here”?

A question like this is completely solved in an answer to another question, but the questions themselves are not duplicates one to another. I've seen recently that some questions were closed but not ...
6
votes
3answers
295 views

Making duplicates for only hints

Should we close questions asking for hints as duplicates? This above discussion is old, and is what I want to rediscuss in light of my question here: $\Bbb F_p$ where $p$ is an odd prime has exactly ...
6
votes
2answers
261 views

Closing as a duplicate if the post contains OP's own proof/solution

It is generally agreed that good question should also indicate what the OP have tried. Many people do this and we receive many questions also contain the OP's attempted proof/solution for the question ...
6
votes
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,...
6
votes
1answer
163 views

Merged questions prevent deletion

Trying to cast a delete vote on https://math.stackexchange.com/questions/204765/show-the-negative-derivative-of-a-function I receive the message[1] When I view linked questions, I find there is ...
6
votes
2answers
516 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?
6
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0answers
213 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 ...
6
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0answers
121 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.
5
votes
1answer
406 views

Totally similar questions are not closed for years

Today, recently viewed this post on combinatorics asking to prove the famous result "If $p$ is a prime, then $p|{p\choose k}, k\in \{1,2,\dots,p-1\}$". I was fairly sure that, It should have been ...