Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [exact-duplicates]

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

14
votes
2answers
380 views

Proof-verification and duplicates.

When someone posts a question, which asks for verification of their proof of something, the mathematical content of that question will often be a duplicate of another question. Now, in order to help ...
10
votes
1answer
374 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.)
2
votes
1answer
97 views

On closing questions as duplicates of “multi-questions”

Call a "multi-question" a question where a user asks two or more questions which are independent of one another, in the sense that they can be answered without reference to one another. For example, ...
9
votes
1answer
244 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 ...
11
votes
3answers
336 views

What action to take on identical questions from the same user?

It sometimes happens that the same user posts exactly the same question twice in a row. Examples: 1 2. user asked twice for the probability of choosing 90% of the colors from a collection of $10^{...
8
votes
1answer
208 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 ...
2
votes
1answer
175 views

Topics declared as duplicates in which order? [duplicate]

I'm asking this because I think an older question with a full answer shouldn't be declared a duplicate to a newer one. What the moderators think about this?
25
votes
1answer
472 views

Allow closing as duplicate for new questions

One of the changes to the closure system in the recent revamp was that to close something as a duplicate, the suggested duplicate needs to have an upvoted answer. I suppose that's a good thing when ...
3
votes
1answer
90 views

Question not visible from certain computers

This sounds strange: when I go to the webpage The units of $\mathbb Z[\sqrt{2}]$, in the right pane, under "Linked", there is a link to the webpage Determine all units of the domain $\mathbb{Z}[\sqrt{...
2
votes
2answers
680 views

What is the definition of duplicate question?

Sometimes it happens that the answer to a question is contained in the answer to a different question. Should the former question be closed as a duplicate? Here's an example, (read the comments). I'...
5
votes
1answer
109 views

What to do if my question is very similar to another but isn't answered there? [duplicate]

I have a doubt about the following: Suppose I want to ask some question, but Math.SE already has one that is very similar (say 90% similar). The chances that my question will be closed as duplicate ...
11
votes
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 ...
10
votes
1answer
142 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 ...
12
votes
1answer
474 views

How aggressively should we tag a question as duplicate?

Some questions seem standard and very likely to have already been asked. For example, a question on Prove Binet's Formula would almost certainly have been asked, even without referring to the links by ...
8
votes
1answer
365 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 ...
11
votes
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 $H$.. ...
17
votes
2answers
332 views

Why are there requirements for duplicated questions?

Today I found a questions to be a duplicate, and I even remembered that I gave an answer to the non-duplicate. As I tried to close the duplicate as a duplicate, it told me I can't choose the question ...
7
votes
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 ...
5
votes
1answer
215 views

What is this notification doing there?

Why is this huge ugly banner appear in possible duplicates? It looks horrible.
2
votes
0answers
160 views

How to tackle “duplicate” problem?

I wanted a post a problem which was very different from my own post Multiple Choice question about a continuous function. But whenever I wanted to post it, it says that this question is an exact ...
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?
9
votes
2answers
330 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 ...
7
votes
1answer
311 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 ...
5
votes
1answer
122 views

On duplicates and linking to the original question

One of the purposes of Stackexchange is to create a sort of library of questions, which is easily searchable. Surely this means that when a question is closed as an exact duplicate a link should be ...
14
votes
5answers
239 views

What to do with a newer post and a related, older, less thorough post?

Let me give a specific example. Today, I answered this post, and my answer seemed familiar. Looking through my old answers, I found that I'd answered this post a while back. The older post is a less ...
28
votes
4answers
470 views

Voting to close as duplicate without taking the time to check if they are

This question has 4 votes to close as being an exact duplicate of this one. Within an hour of the question being asked, someone voted to close it as an exact duplicate AND Davide Giraudo pointed out, ...
13
votes
4answers
687 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 ...
1
vote
1answer
736 views

Reopening a 48/2(9+3) question (ambiguous order of operations)?

There was an internet meme started last year about ambiguously written arithmetical expressions leading to arguments for different possible values. Of course this is not a good place to host ...
11
votes
4answers
499 views

Should this question be closed as duplicate?

Here we have an interesting situation: the question Is an algebraic integer all of whose conjugates have absolute value 1 a root of unity? was asked. While there doesn't seem to be an exact ...
10
votes
1answer
543 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 ...
5
votes
1answer
424 views

Should we close one of these questions about whether $\frac{1}{\infty}=0$ as a duplicate of the other?

This question and this question are both asking about $\frac{1}{\infty}=0$, though the first one is specifically asking about interpreting it in the context of probability. Should one of these ...
8
votes
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 ...
2
votes
0answers
101 views

More duplicates

I'm wondering if anything should be done about the following 3 questions which seem to me like duplicates (like merge them): is there a converse for the following Theorem? Equivalent systems of ...
5
votes
1answer
129 views

Please comment on this possible answer for abstract duplicate of “integration by partial fractions”

I've expanded an old answer to include a general discussion of how to solve integrals by partial fractions. Before I add it to the list of abstract duplicates, I'd appreciate corrections and ...
11
votes
0answers
130 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 ...
11
votes
3answers
341 views

Handling users asking lots of similar questions with little work

I realize that one of the major goals of this site is to help others learn and understand mathematics, and in fact it is one of my favorite parts of math.SE. As such, I don't mind a bit when I see a ...
20
votes
2answers
607 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 ...
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
votes
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 ...
10
votes
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
votes
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 ...
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 ...
79
votes
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 ...