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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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Auto-detecting the duplicate posts

After and during writing the question on MSE, some similar posts are suggested by the site. However, there are still many duplicate questions posted every day. I think it would be a good idea to ...
Etemon's user avatar
  • 6,643
18 votes
1 answer
705 views

Why I seemingly cannot find my question when searching but then later when I get flagged for duplicate question I find the similar question

I try to avoid creating duplicates but I always fail. Consider my recent question. I was searching the finite subgroup criterion. So I typed into the search function "Finite subgroup criterion&...
likely_fail_2202 T_T's user avatar
2 votes
2 answers
127 views

Answered a question that I later realized is a duplicate

I have just added an answer to a question that, shortly after posting my answer, I realised is probably a duplicate of this other question, as suggested in the comments, and I flagged it as such. My ...
Anakhand's user avatar
  • 2,642
11 votes
1 answer
596 views

What should I do with my downvoted duplicate post?

My post has been downvoted, and I'm not sure what the appropriate action is for me to take. On the one hand, there's contribution from other users so the post can't and shouldn't be deleted. On the ...
George's user avatar
  • 821
9 votes
0 answers
581 views

Should this special case question (that has a proof) be marked as a duplicate of the general case question (that doesn't have a proof)?

I recently found this question: Proof of the Existence of All Phone Numbers in Pi I understand why it can be seen as a duplicate of Does π contain all possible number combinations?, but the question ...
DecimalTurn's user avatar
11 votes
1 answer
572 views

Is it a duplicate if the same question exists in another site?

I often see some questions which are the same or similar to other questions on another site (Like AOPS, Math Overflow, etc.) Is it a duplicate if other questions in OTHER SITES can answer the question?...
RDK's user avatar
  • 2,785
-8 votes
1 answer
335 views

Don't close solution verification as dupe, instead remove questions with the tag of [solution-verification] appearing in search

Unless the dupe target contains exact question with exact same proof (without further generality), I'd recommend not closing as dupe. I know, it can be frustrating when one sees the same question ...
Babu's user avatar
  • 11.7k
4 votes
1 answer
178 views

What to do when you misidentify a duplicate?

Normally I don't like to refer to specific posts by other people, but this is about my own mistake so I think it's acceptable. I recently proposed this question about the equivalence of the Axiom of ...
Greg Nisbet's user avatar
  • 11.7k
31 votes
1 answer
682 views

How exactly are we incentivized to post links to duplicates?

So yesterday I came across a question (we'll call it Question $1$) which I found interesting, and after having spent a little time thinking about it without result, I started searching MSE for some ...
mechanodroid's user avatar
  • 46.6k
-5 votes
1 answer
164 views

Add a list of FAQs [duplicate]

I think that there should be a list of frequently asked math questions. Let a question be called a sub-duplicate of another question if it is that other question or it is closed as a duplicate of a ...
mathlander's user avatar
  • 4,047
21 votes
0 answers
472 views

Question closed as duplicate, but the linked question was deleted

This is related to Question closed as a duplicate, link points to question closed as a duplicate, but it is more problematic. The question (Q) Prove that quotient topology $\mathbb{R}/\sim$ is the ...
Paul Frost's user avatar
  • 77.4k
0 votes
1 answer
97 views

Closing a duplicate of a very old question

Normally I would vote to close a question which had been pointed out as a duplicate in a comment and which indeed was a duplicate. However, I noticed that the question concerned was originally posted ...
John Bentin's user avatar
  • 18.8k
7 votes
0 answers
717 views

How do we handle a chain of "duplicate" questions that are linked to a "missing context or other details" question?

The following chain questions are currently all closed: Proving that $\langle x, y \rangle$ is a not principal ideal of $\mathbb{Q}[x, y]$ Non-principal ideal in $K[x,y]$? The ideal $I= \langle x,y \...
user avatar
-4 votes
1 answer
130 views

When should posts be closed as duplicates?

One could answer " when they are the same" but what if a question is answered by combination of more than one old post? So, let's say a question ask how to show a statement C from a ...
Babu's user avatar
  • 11.7k
7 votes
0 answers
148 views

Closing a post with multiple duplicates

Many questions posted on the site are duplicates, but sometimes it's not easy to identify the most perfect match. Frequently, for instance, there is an older question, itself a closed duplicate, that ...
lulu's user avatar
  • 71.1k
1 vote
0 answers
119 views

Close as duplicate when the "duplicate" appeared several years later [duplicate]

It does not make sense to me that you get your question closed when the duplicate causing it to be closed has appeared many years later. And the question being closed already has a satisfactory and ...
Richard Collins's user avatar
17 votes
0 answers
651 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 ...
Mikel Solaguren's user avatar
13 votes
0 answers
368 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 ...
Verónica Rmz.'s user avatar
-9 votes
1 answer
200 views

Why can't I edit a new question in place of a duplicate?

I have $5$ or so duplicate/closed questions, which is hurting my "positive question record" statistic. So, I edited a useless duplicate question and asked a new question, which I was told &...
Clyde Kertzer's user avatar
-6 votes
2 answers
310 views

Duplicates allowed from years ago, but mine are not

This is annoying. I spend $15$ minutes looking for resources online for a question I have, I check SE, approach$0$, all the wikis, etc. and have found nothing. So, I spend a good while writing up my ...
Clyde Kertzer's user avatar
7 votes
1 answer
360 views

Are questions about (problems with) specific approaches duplicates?

Recently this question about a classic contest problem was closed as a duplicate of another about the same problem. The closed question asks about a specific approach to the problem, though, and how ...
Steven Stadnicki's user avatar
2 votes
1 answer
165 views

Statistics of fraction of questions closed per month (posted that month itself)

Is there any way I can access the data of what fraction of questions are being closed as dupes per month. So, for example, I want to compare how many Qs posted in January this year was closed that ...
Babu's user avatar
  • 11.7k
2 votes
0 answers
655 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, ...
Bumblebee's user avatar
  • 1,203
33 votes
2 answers
2k views

Can we have "2021: a year of EoQS"?

In Paramanand's questionnaire response, he suggests that the effects of the EoQS should be studied. This made me realise that I don't really know anything past the "theory" of the EoQS since ...
Calvin Khor's user avatar
13 votes
0 answers
642 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 ...
Arturo Magidin's user avatar
7 votes
0 answers
103 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 ...
PatrickR's user avatar
  • 4,371
5 votes
1 answer
341 views

Where to Place Answer to a Duplicate Question

I recently posted this answer to a question marked as a duplicate. I did check first that my approach had not previously been taken. Should I delete my answer and transplant the analysis as an ...
user2661923's user avatar
  • 36.1k
3 votes
0 answers
312 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 ...
user's user avatar
  • 156k
5 votes
1 answer
426 views

A question was closed as being a duplicate. But it's not a duplicate.

I recently came across this question which was closed as being a duplicate of that question. But if we read carefully, we see that there is a slight difference. In "this question", it's ...
perroquet's user avatar
  • 1,066
13 votes
1 answer
361 views

Criteria for closing questions as duplicates

I recently came across this question which was closed as being a duplicate. When I read the linked source question, it was not a literal or even particularly specifically close duplicate, but in all ...
Keith Backman's user avatar
1 vote
0 answers
94 views

Make linking of questions a transitive relation

Right now if $a$ is a dupe of $b$ and $b$ is marked as a dupe of $c$, then $a$ doesn't appear in the linked questions for $c$. It maybe helpful if question $c$ could inherit all the dupes from the ...
Babu's user avatar
  • 11.7k
0 votes
0 answers
76 views

Question with wrong answer used for duplicates

This question is being used as the main reference when people ask for proofs that $\binom{2^n -1}k$ is always odd, see for example here and here. However, the question and its accepted answer claim a ...
user347489's user avatar
  • 1,869
13 votes
2 answers
929 views

Is there a canonical "What's the intuition behind integration?" question?

Is there a canonical "What's the intuition behind integration?" question? If not should we declare one? Either case here and here are two example of this question on SE. There are probably ...
Mike Pierce's user avatar
0 votes
1 answer
117 views

Probable homework question showing detailed work, followed by very similar question from another user, showing little work: flag as duplicate, or not?

Yesterday, a question was posted asking for comments on a fully detailed solution to what was obviously a coursework question. The OP's solution was essentially correct, just overly complicated. The ...
Calum Gilhooley's user avatar
0 votes
0 answers
86 views

Should duplicate closing be based on quality or on time of posting? [duplicate]

Here's a scenario: Suppose there are two persons X and Y, now person X posts a question about topic Z but with a poor title (and poor presentation overall), now some time later (maybe years) , person ...
Babu's user avatar
  • 11.7k
1 vote
1 answer
112 views

Duplicate flag was replaced by comment in my name

Yesterday I flagged this question: restriction diagonalizable operator is diagonalizable as a duplicate of this other question: Diagonalizable transformation restricted to an invariant subspace is ...
PatrickR's user avatar
  • 4,371
112 votes
7 answers
15k views

Enforcement of Quality Standards

Math SE has a long-standing policy regarding what constitutes a Good Question. The policy is intended to ensure that the collection of questions and answers here is of high quality, is searchable, ...
Xander Henderson's user avatar
  • 29.8k
0 votes
1 answer
185 views

Question closed after 4 years

I was surprised to see this The multiplicative groups $\mathbb{Q}^\ast$ and $\mathbb{R}^\ast$ are not isomorphic question of mine, which is over 4 years old, closed today. I was alerted earlier today ...
user133281's user avatar
  • 16.1k
9 votes
0 answers
118 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 ...
Babu's user avatar
  • 11.7k
9 votes
1 answer
326 views

Advice on closing questions as duplicates

In a very recent question the OP had made considerable amount of progress in proving an inequality. The OP was only left to prove the inequality $x^2y+y^2z+z^2x\le \frac{4}{27}$. Myself knowing that ...
Albus Dumbledore's user avatar
14 votes
0 answers
474 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 ...
open problem's user avatar
  • 1,410
4 votes
1 answer
192 views

How to flag a question that asks multiple duplicated questions?

How can I close Suggestions for a good statistics book and a calculus book? as duplications both What are the recommended textbooks for introductory calculus? and Recommend a statistics fundamentals ...
user avatar
28 votes
1 answer
1k views

Why do high rep, long time users answer duplicate or too similar questions on book recommendations?

Way too many duplicates to Selecting the Real Analysis Textbooks, Recommend a statistics fundamentals book, What is the best book to learn probability?! I feel that too many book recommendations ...
user avatar
19 votes
0 answers
406 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 ...
Integrand's user avatar
  • 8,477
-2 votes
1 answer
118 views

Merge request of two almost-identical answers

The answers https://math.stackexchange.com/a/831870/290189 and https://math.stackexchange.com/a/831830/290189 contain the same math equations with the same variables. The logic is the same, only the ...
GNUSupporter 8964民主女神 地下教會's user avatar
10 votes
2 answers
583 views

How to search for duplicate of this classic complex analysis question?

Aim A quick search for duplicates. Question If $|f(z) |\leq 1 + |z|$, show that $f(z) = az + b$ is a recently-posted question. I tried to search for its duplicates on Approach0 but I didn't manage to ...
GNUSupporter 8964民主女神 地下教會's user avatar
9 votes
1 answer
141 views

Question closed as a duplicate, link points to question closed as a duplicate

This question about an isomorphism between a localization and a quotient of a polynomial ring was properly closed as a duplicate. However, the question identified as the duplicate is this, which was ...
Arturo Magidin's user avatar
-3 votes
1 answer
294 views

People behavior in math.stackexchange [duplicate]

I was struggling with a math problem and just went to send it to math.stackexchange in order to check my answer. but I see tsunami of condescension and arrogance. some people targeting the question ...
Etemon's user avatar
  • 6,643
10 votes
1 answer
296 views

Should I comment an old question or create a new one?

I have some questions about a Probability problem, which has already been asked and has a quite comprehensive answer. I am not arriving at the same result and I can not find out where my reasoning ...
nico_so's user avatar
  • 135
2 votes
0 answers
86 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 ...
Anindya Prithvi's user avatar

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