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Mathematics

Timeline for List of Generalisations of Common Questions

Current License: CC BY-SA 4.0

165 events
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Aug 27 at 23:46 history edited Lucenaposition CC BY-SA 4.0
added 128 characters in body
Dec 13, 2024 at 23:27 answer added CrSb0001 timeline score: 2
Dec 4, 2024 at 23:54 history edited CrSb0001 CC BY-SA 4.0
Added questions about quintics (solvability vs unsolvability), will try to find examples for higher degrees.
Dec 4, 2024 at 23:16 history edited CrSb0001 CC BY-SA 4.0
Added links for various derivations of quadratic and cubic formulae
Feb 3, 2024 at 15:34 history edited Theo Bendit CC BY-SA 4.0
Added my own FAQ about interpreting row-echelon forms of matrices
Nov 16, 2023 at 22:55 answer added user2661923 timeline score: 2
Oct 18, 2023 at 17:27 history edited Jyrki Lahtonen CC BY-SA 4.0
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Sep 17, 2023 at 18:16 history edited Mike Earnest CC BY-SA 4.0
Updated the combinatorics list a bit; The current stars-and-bars duplciate is a little too general, so I split it into several, more focused questions.
Aug 1, 2023 at 15:08 history edited José Carlos Santos CC BY-SA 4.0
Another frequent duplicate
Mar 19, 2023 at 0:55 history edited Xander HendersonMod CC BY-SA 4.0
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Mar 7, 2023 at 17:07 comment added gist076923 This sort of product of limits question gets asked a bunch math.stackexchange.com/questions/4653309/…
Feb 26, 2023 at 8:09 history edited Parcly Taxel CC BY-SA 4.0
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Feb 26, 2023 at 1:28 history edited Parcly Taxel CC BY-SA 4.0
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Feb 4, 2023 at 18:48 history edited MJD CC BY-SA 4.0
more exponentiation
Oct 7, 2022 at 23:26 history edited Mike Pierce CC BY-SA 4.0
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Oct 3, 2022 at 16:11 history edited Parcly Taxel CC BY-SA 4.0
refresh
Sep 26, 2022 at 1:33 history edited Parcly Taxel CC BY-SA 4.0
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Sep 25, 2022 at 9:37 history edited Parcly Taxel CC BY-SA 4.0
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Sep 25, 2022 at 8:11 history edited Parcly Taxel CC BY-SA 4.0
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Sep 25, 2022 at 8:04 history edited Parcly Taxel CC BY-SA 4.0
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Sep 1, 2022 at 23:13 history edited Eric Snyder CC BY-SA 4.0
Added FAQ on prime forms
Jul 23, 2022 at 15:09 history edited Arctic Char
edited tags
May 21, 2022 at 16:22 history edited Lee Mosher CC BY-SA 4.0
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Nov 9, 2021 at 6:12 history edited Jyrki Lahtonen CC BY-SA 4.0
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Sep 7, 2021 at 14:54 history edited Xander HendersonMod CC BY-SA 4.0
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Jul 12, 2021 at 4:05 comment added Gerry Myerson I'm surprised there's nothing here on differential equations.
Jul 1, 2021 at 14:56 history edited Mike Earnest CC BY-SA 4.0
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Oct 31, 2020 at 21:27 history edited Jyrki Lahtonen CC BY-SA 4.0
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Oct 31, 2020 at 21:16 history edited Jyrki Lahtonen CC BY-SA 4.0
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Jul 12, 2020 at 21:15 history edited John Omielan CC BY-SA 4.0
Add a link to a generalized post related to dealing with the multiple posts asking to prove, in some fashion, that among $2n - 1$ integers, there's always a subset of $n$ integers which sum to a multiple of $n$. Also, fix a spelling mistake.
Dec 5, 2019 at 21:59 history edited Sera Gunn CC BY-SA 4.0
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Nov 27, 2019 at 19:02 history edited Xander HendersonMod CC BY-SA 4.0
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Mar 27, 2019 at 13:29 history edited YuiTo Cheng CC BY-SA 4.0
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Jan 22, 2019 at 11:40 history edited Lee David Chung Lin CC BY-SA 4.0
Add links to variations volume of intersection of cylinders
Jan 22, 2019 at 10:41 history edited Lee David Chung Lin CC BY-SA 4.0
Add a sub-category (not part of the tag system) of `Calculus Meets Geometry` under `Calculus`, mainly for `Volume of Intersection of Cylinders`
Jan 22, 2019 at 10:21 history edited Lee David Chung Lin CC BY-SA 4.0
Mardown each category by just one # instead of three ### to allow nested structure. Merge an entry of `Set Theory` to `Elementary Set Theory`. Move topology to that separate post.
Nov 26, 2018 at 16:58 history edited Sera Gunn CC BY-SA 4.0
Add counting problems for number of spanning trees with(out) a given edge
Nov 14, 2018 at 2:13 history edited Sera Gunn CC BY-SA 4.0
Move some of the more algebraic summation identities to their own answer
Nov 13, 2018 at 11:25 history edited Lee David Chung Lin CC BY-SA 4.0
Relocate the fields `Probability` and `Statistics` to a separate anwser (delete them here).
Nov 13, 2018 at 11:24 answer added Lee David Chung Lin timeline score: 10
Aug 11, 2018 at 13:02 history edited Simply Beautiful Art CC BY-SA 4.0
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Aug 11, 2018 at 10:51 answer added Sil timeline score: 9
Mar 8, 2018 at 20:38 history edited user14972 CC BY-SA 3.0
Put the phrase "abstract duplicate" in the body of the post.
Feb 10, 2018 at 23:55 answer added user99914 timeline score: 8
Jan 25, 2018 at 3:46 history edited hardmath CC BY-SA 3.0
added stars-and-bars question to list of Combinatorics abstract duplicates
Jan 25, 2018 at 3:34 history edited hardmath CC BY-SA 3.0
added a men-and-women alternating seating type question per Meta thread to Combinatorics
Nov 15, 2017 at 22:53 history edited Misha Lavrov CC BY-SA 3.0
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Nov 11, 2017 at 14:30 history edited Peter Taylor CC BY-SA 3.0
Add "How many ways can N elements be partitioned into subsets of size K?"
Sep 7, 2017 at 8:48 history edited Jyrki LahtonenMod CC BY-SA 3.0
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Aug 28, 2017 at 21:41 history edited Simply Beautiful Art CC BY-SA 3.0
edited body
Aug 26, 2017 at 6:00 answer added Hans Lundmark timeline score: 6
Jul 15, 2017 at 21:09 comment added Simply Beautiful Art If this isn't already on here, we should probably include Complex exponentiation “proof” that $\pi=0$ or for which complex $a,b,c$ does $(a^b)^c=a^{bc}$ hold? or $1=e^{2\pi}$ where did I make my mistake?
Jun 26, 2017 at 14:18 history edited Sera Gunn CC BY-SA 3.0
Added a question to linear-algebra
Apr 13, 2017 at 12:22 history edited CommunityBot
replaced http://math.stackexchange.com/ with https://math.stackexchange.com/
Apr 7, 2017 at 3:39 history edited erfink CC BY-SA 3.0
Added Gram-Schmidt
Apr 5, 2017 at 16:05 history edited Stella Biderman CC BY-SA 3.0
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Mar 16, 2017 at 16:37 history edited CommunityBot
replaced http://meta.math.stackexchange.com/ with https://math.meta.stackexchange.com/
Mar 16, 2017 at 16:37 history edited CommunityBot
replaced http://meta.math.stackexchange.com/ with https://math.meta.stackexchange.com/
Mar 16, 2017 at 16:37 history edited CommunityBot
replaced http://meta.math.stackexchange.com/ with https://math.meta.stackexchange.com/
Mar 16, 2017 at 16:37 history edited CommunityBot
replaced http://meta.math.stackexchange.com/ with https://math.meta.stackexchange.com/
Mar 16, 2017 at 16:37 history edited CommunityBot
replaced http://meta.math.stackexchange.com/ with https://math.meta.stackexchange.com/
Mar 16, 2017 at 4:00 comment added Stella Biderman Explanation of how to compute eigenvectors by using determinants and solving the resultant polynomial
Jan 13, 2017 at 20:21 comment added Stella Biderman Finding eigenvectors of small matrices by solving the characteristic polynomial
May 9, 2015 at 22:20 history edited epimorphic CC BY-SA 3.0
Question also covers the rational case
Apr 9, 2015 at 14:37 comment added Bart Michels Some common divisibility problems: this (special case) and also this
Apr 8, 2015 at 11:36 answer added Jack D'Aurizio timeline score: 12
Feb 22, 2015 at 13:13 history edited Marc van Leeuwen CC BY-SA 3.0
Remove indication of an "abstract combinatorics question" that is unlinked and does not obviously exist
Feb 22, 2015 at 12:10 history edited Marc van Leeuwen CC BY-SA 3.0
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Feb 16, 2015 at 13:16 history edited Marc van Leeuwen CC BY-SA 3.0
added 142 characters in body
Jan 7, 2015 at 22:38 answer added anon timeline score: 14
Dec 19, 2014 at 2:39 answer added N3buchadnezzar timeline score: 24
Aug 18, 2014 at 4:28 history edited davidlowrydudaMod CC BY-SA 3.0
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May 25, 2014 at 19:15 history edited user61527 CC BY-SA 3.0
added 95 characters in body
Apr 30, 2014 at 17:09 history edited Andrés E. Caicedo CC BY-SA 3.0
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Apr 30, 2014 at 16:38 history edited MJD CC BY-SA 3.0
added 161 characters in body
Apr 16, 2014 at 4:27 history edited MJD CC BY-SA 3.0
added 178 characters in body
Apr 9, 2014 at 0:10 history edited MJD CC BY-SA 3.0
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Apr 8, 2014 at 2:12 answer added MJD timeline score: 29
Apr 4, 2014 at 6:12 history edited MJD CC BY-SA 3.0
how many elements of order 2?
Apr 4, 2014 at 5:41 history edited MJD CC BY-SA 3.0
0^0
Mar 18, 2014 at 23:32 history edited MJD CC BY-SA 3.0
+different kinds of infinity
Mar 17, 2014 at 19:42 history edited MJD CC BY-SA 3.0
add set theory FAQ: the set of all n-element subsets of N is countable
Feb 14, 2014 at 19:02 history edited MJD CC BY-SA 3.0
limit of {n^n}\over n!
Feb 10, 2014 at 20:40 history edited MJD CC BY-SA 3.0
1+2+3+… = -1/12
Feb 3, 2014 at 19:15 history edited MJD CC BY-SA 3.0
derivative of functions of the form f(x)^g(x)
Nov 29, 2013 at 6:23 history edited MJD CC BY-SA 3.0
added 247 characters in body
Nov 17, 2013 at 17:59 history edited Nate Eldredge CC BY-SA 3.0
solving triangles
Oct 31, 2013 at 11:49 answer added Lord_Farin timeline score: 17
Oct 31, 2013 at 11:36 history edited Lord_Farin
This deserves to be faq
Oct 25, 2013 at 20:48 history edited MJD CC BY-SA 3.0
added 114 characters in body
May 14, 2013 at 18:41 history edited MJD CC BY-SA 3.0
+ Intuitive meaning of 'e'
May 3, 2013 at 17:31 history edited J. M. ain't a mathematician CC BY-SA 3.0
added 58 characters in body
May 2, 2013 at 1:57 history edited MJD CC BY-SA 3.0
sum of squares
Aug 30, 2012 at 1:16 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Aug 30, 2012 at 0:22 history edited Eric NaslundMod CC BY-SA 3.0
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Aug 12, 2012 at 5:44 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Jul 20, 2012 at 0:17 history edited J. M. ain't a mathematician CC BY-SA 3.0
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May 28, 2012 at 14:05 history edited MJD CC BY-SA 3.0
add links to many topology book recommendations
May 16, 2012 at 6:31 history edited Willie WongMod CC BY-SA 3.0
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May 6, 2012 at 2:22 history edited user17762 CC BY-SA 3.0
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May 4, 2012 at 22:07 history rollback Aryabhata
Rollback to Revision 40
May 4, 2012 at 22:06 comment added Aryabhata @Marvis: Please just don't add in questions like that. We first should generalize the question, add an answer to the generalized question (if missing), tag it with the faq tag. Future minor variants can now be closed as dupe of this. Also, there should only be one (generalized) question, rather than a bunch of related question. I am rolling back your edit for now. I suggest you look at some of the other questions in the list to see what I mean.
May 4, 2012 at 21:44 history edited user17762 CC BY-SA 3.0
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Apr 27, 2012 at 16:32 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Apr 27, 2012 at 16:25 history edited Arturo Magidin CC BY-SA 3.0
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Apr 20, 2012 at 1:21 history edited PedroMod CC BY-SA 3.0
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Apr 17, 2012 at 18:24 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Mar 7, 2012 at 5:49 history edited Arturo Magidin CC BY-SA 3.0
add a duplicate
Mar 2, 2012 at 1:54 history edited Aryabhata CC BY-SA 3.0
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Feb 26, 2012 at 10:43 history edited Aryabhata CC BY-SA 3.0
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Dec 19, 2011 at 0:28 comment added J. M. ain't a mathematician Hmm, I actually think it's a good thing that this "question" has no upvoted answers (and to that effect, please don't upvote any!). The bot will bump it up periodically, and we always get a reminder of these dupes.
Nov 19, 2011 at 15:58 comment added Isaac Mostly the former, as Willie indicated, but sometimes the latter when there have been numerous specific examples of some nicer general principle, none of which would have been easy to edit into the canonical question.
Nov 18, 2011 at 23:40 history edited Srivatsan CC BY-SA 3.0
added the harmonic series question to the sequences and series list as well
Nov 18, 2011 at 19:12 history edited Srivatsan CC BY-SA 3.0
added "divergence of the harmonic series" to the list
Nov 18, 2011 at 12:50 comment added Willie Wong Mod The former. And we usually don't bother until at least a couple dupes appears.
Nov 18, 2011 at 10:20 history edited user7530 CC BY-SA 3.0
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Nov 16, 2011 at 8:55 history edited J. M. ain't a mathematician CC BY-SA 3.0
edited body
Nov 16, 2011 at 6:54 history edited user7530 CC BY-SA 3.0
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Nov 13, 2011 at 21:42 history edited yasmar CC BY-SA 3.0
added link to a determinant question
Nov 10, 2011 at 23:53 comment added user7530 Is the goal to find examples "in the wild" of common questions, that we then coopt and retag as faq? Or do we create new community wiki questions tagged faq specifically for the purpose of answering them comprehensively (as was done on SO)?
Nov 10, 2011 at 17:23 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Oct 31, 2011 at 7:14 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Oct 20, 2011 at 23:26 history edited Dilip Sarwate CC BY-SA 3.0
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Oct 20, 2011 at 22:36 history edited Dilip Sarwate CC BY-SA 3.0
added different question with slightly different title to "Upper tail inequality for the standard normal distribution"
Oct 20, 2011 at 15:01 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Oct 19, 2011 at 12:45 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Oct 4, 2011 at 0:51 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Sep 26, 2011 at 21:46 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Sep 26, 2011 at 19:37 history edited Asaf KaragilaMod CC BY-SA 3.0
Bump for the new academic year!
Jul 24, 2011 at 0:43 history edited J. M. ain't a mathematician CC BY-SA 3.0
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Jul 13, 2011 at 18:30 history edited Aryabhata CC BY-SA 3.0
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Apr 20, 2011 at 4:10 comment added Eric Naslund @all : Two questions: $$(1)$$ Should all of the posts be flagged for moderator attention and made community wiki? $$(2)$$ When making an abstract duplicate page, should we create a new separate question, or modify an existing question? (Or should we just use our judgment, and if there is a suitable host, take it over, and if not create a new question?) From experience, there isn't always a suitable question to modify.
Apr 20, 2011 at 2:34 history edited Bill Dubuque CC BY-SA 3.0
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Apr 20, 2011 at 2:06 history edited Eric Naslund CC BY-SA 3.0
Added a thread regarding finding the limit of rational functions.
Apr 19, 2011 at 18:30 comment added Bill Dubuque @Jeff: Yes, I know about the automagically generated faqs. Of course one could do much better if one had explicit manual control. AI is far from up to the task, esp. in deeply abstract domains such as mathematics.
Apr 19, 2011 at 18:11 comment added Jeff Atwood StaffMod @bill the automatically generated faqs (based on internal link count) for the tag are fairly close to what you're describing.. math.stackexchange.com/questions/tagged/calculus?sort=faq perhaps the tag wiki page itself would get us the rest of the way there? math.stackexchange.com/tags/calculus/info
Apr 18, 2011 at 12:56 history edited t.b. CC BY-SA 3.0
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Apr 18, 2011 at 12:47 history edited Willie WongMod CC BY-SA 3.0
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Apr 8, 2011 at 20:19 comment added Bill Dubuque @Jeff Atwood: I think it'd be better for each tagged subject to have a corresponding meta thread of faqs, abstract duplicates, etc. These could be displayed to low-rep users when they add a tag to a question. Better we could force them to choose a subject/tag before composing a question, so they see the subject-specific faqs first. This would go a long way towards removing the noise/overhead generated by duplicate questions (a big problem for a general-level math forum since exercises are often tweaked year-after-year to eliminate copying - yielding abstract, not exact, duplicates).
Apr 8, 2011 at 18:44 history edited Willie WongMod CC BY-SA 3.0
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Mar 31, 2011 at 20:35 comment added Eric Naslund Question: Should questions such as "Why is $0.999..=1?$" "Why is $0^0=1$? and "Why does $0!=1$" be added to this list? Should we make one question dealing with all of them at once? I mean they are asked frequently enough, occasionally with slight variations, but are definitely not "abstract generalizations." Thoughts? How could one question be added that deals with all of these type of things at once?
Mar 31, 2011 at 20:04 comment added Eric Naslund @Isaac: But that might lengthen the list by a large amount. I mean both the questions in the calculus tag have other tags, namely "Integral" and "Limit," but I don't think it is a good idea to create separate categories and put them in those categories. That wouldn't be a useful addition. The geometric series is definitely in the series category, why does it need to be in algebra/pre-calculus as well? Tagging the question as such is of course a good idea. Then searching the FAQ tag on the main site is very easy. But in this list? I don't understand the need.
Mar 31, 2011 at 19:57 comment added Isaac @Eric: It'll be much harder to find questions, especially when the list gets long, if they aren't listed under all relevant categories.
Mar 31, 2011 at 19:56 history rollback Isaac
Rollback to Revision 9
Mar 31, 2011 at 19:54 comment added Eric Naslund @Moron, @Arturo : I agree with only adding a Question to one spot on this list. For example, the limit question is tagged as both "calculus" and "limits," but is only put in one category on this page. On the other hand, I much prefer the idea of editing this question rather than posting answers to it. I think it keeps things concise, and much more organized, even if the question itself does eventually become quite long. (The conciseness is a big thing. If we have too many categories, the answers could stretch onto multiple pages which I feel is worse)
Mar 31, 2011 at 19:51 history edited Eric Naslund CC BY-SA 2.5
Geometric series appeared twice in this list. I removed it from Algebra-Precalculus as it belongs in Sequences and Series
Mar 31, 2011 at 18:44 comment added Jonas Meyer @Arturo: I think that questions from the unanswered list only get bumped if they have an answer (necessarily none accepted or with positive vote count). (If I'm wrong, will someone please inform me?) But I agree with (ii).
Mar 31, 2011 at 18:37 comment added Aryabhata @Arturo: I think having this question pop up periodically is probably a good thing :-) I do agree with one tag answer thing. If enough people upvote your comment, I will make the edits :-)
Mar 31, 2011 at 18:32 comment added Arturo Magidin @Moron: Yes, I understand; but (i) we probably don't want this question to keep popping up as "unanswered". And (ii) I think if we had one answer per category (or per tag) and have people "add it to the list" there it would make more sense. Right now the question is fine, but if this keeps up, the question itself will grow too lengthy to be manageable, I think.
Mar 31, 2011 at 18:30 comment added Aryabhata @Arturo: Yes, we could have one answer per category. Having one question per answer might not be that good. The intent was to keep the list in one place so that we can browse through easily.
Mar 31, 2011 at 18:27 comment added Arturo Magidin Shouldn't the questions be "answers" rather than edits to the question?
Mar 31, 2011 at 17:14 history edited Isaac CC BY-SA 2.5
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Mar 31, 2011 at 17:09 history edited Aryabhata CC BY-SA 2.5
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Mar 31, 2011 at 17:09 comment added Aryabhata @Jeff: I actually almost edited that tag in! But was afraid faq might be a moderator only tag and it might be inappropriate. I think we should tag it that way, to make it easier to search etc. In fact, I will go ahead and do it.
Mar 31, 2011 at 17:03 history edited Aryabhata CC BY-SA 2.5
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Mar 31, 2011 at 7:05 comment added Jeff Atwood StaffMod @eric I would support a simpler faq tag which is what these are, correct? frequently asked math questions on this site?
Mar 31, 2011 at 5:53 comment added Aryabhata @Arturo: I had flagged that to make it CW. Since I expect we will just be consolidating different answers (perhaps from different people), making it CW would be the right thing to do...
Mar 31, 2011 at 4:16 comment added Arturo Magidin Are we also attempting to make these questions community wikis? This was the case with the first one for calculus (integrals of polynomials in sines and cosines), but doesn't seem to have been done for the second one yet.
Mar 31, 2011 at 1:41 history edited Eric Naslund CC BY-SA 2.5
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Mar 30, 2011 at 22:31 history edited Isaac CC BY-SA 2.5
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Mar 30, 2011 at 21:50 history edited Isaac CC BY-SA 2.5
minor formatting
Mar 30, 2011 at 21:44 history edited Aryabhata CC BY-SA 2.5
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Mar 30, 2011 at 19:09 history made wiki Post Made Community Wiki by Qiaochu YuanMod
Mar 30, 2011 at 18:57 history edited Aryabhata CC BY-SA 2.5
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Mar 30, 2011 at 18:46 history asked Aryabhata CC BY-SA 2.5
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