User talk:JayBeeEll/Archives/2017/

Thanks for the serial rvv

Thanks for manually "mass-reverting" all those individual article insertion vandalisms recently by that IP... Chill-- (talk) (c) 05:00, 20 January 2017 (UTC)

Proof that absolute convergence implies convergence

Dr. Lewis,

Thanks for the revert on the absolute convergence article. My apologies for wasting your time! I read the proof in a sloppy manner and deleted it while it was quite valid (although the WLOG required some clarification). I added a few lines to the beginning of the proof. Hope you don't mind the addition of some obvious statements.

Anyway, what do I know? I'm just a chemist and I can only hope to dabble in math :-)

-Jimmy Alsosaid1987 (talk) 23:39, 29 January 2017 (UTC)

Hi Alsosaid1987, no apologies needed. I am totally overwhelmed in real life at the moment and so not prepared to engage in a substantive way with you about this, so let me throw out a few quick thoughts: this is an encyclopedia article, so what would be even better than a proof would be a reference to a proof in a textbook or something equivalent. I am very skeptical that two proofs of this result are needed, let alone an additional proof in a slightly more general setting. That said, including extra proofs is certainly not the worst sin committed in math articles in WP. If I had time I might take a swing at editing it myself, but I think realistically that is not going to happen any time soon.

All the best, JBL (talk) 21:42, 3 February 2017 (UTC)

Only

You can reasonably argue that I am being pedantic, but I like to place the word "only" near the word or words that are being restricted, despite that colloquial English is more forgiving. We have several possibilities here for the Multiset article:

1. "multisets exist which only contain elements a and b". In this case we have containment only. We are excluding the possibility that the multisets insert-verb-here the elements, when insert-verb-here is other than "contain", e.g., "surround".
2. "multisets exist which contain only elements a and b". In this case we have an elemental nature only. We are excluding the possibility that multisets contain insert-noun-here a and b, when insert-noun-here is other than "elements", e.g., "subsets".
3. "multisets exist which contain elements a and b only". In this case we have a and b only. We are excluding the possibility of "c", etc.

I am thinking that we want to emphasize #3. 𝕃eegrc (talk) 15:37, 3 February 2017 (UTC)

Hi Leegrc,

I do not think pedantry is relevant. Instead, it appears that you have invented a false theory about the relationship of word placement to meaning. Placing "only" at the end of a sentence is an artificial and stilted construction; it has the ring of sentences constructed by new learners of English, not native speakers. The other two are totally understandable and read naturally.

Best, JBL (talk) 21:49, 3 February 2017 (UTC)

I disagree on several points, but I've already put my best case forward and you did not find it convincing. Let's just do it your way. 𝕃eegrc (talk) 20:36, 4 February 2017 (UTC)

Source you asked for

In this[1] edit you asked for the source of the statement about what the mathematical community believed. It was from a plenary conference talk by Miklos Bona. I have no idea if the background history is in the literature anywhere as permutations are not my field of study so I don't read their literature. Jbeyerl (talk) 18:58, 13 March 2017 (UTC)

Hi Jbeyerl, thanks for your response. On one hand, Bona is certainly an expert in the area and I trust his assessment on something like this. On the other hand, an audience report of what someone said in an unrecorded conference talk is of course not acceptable as a reliable source on WP. What was the conference? Perhaps we can track a proper source down. --JBL (talk) 20:27, 15 March 2017 (UTC)

The conference was CGTC48, [[2]]. Unfortunately as far as I know they don't publish the presentations or slides from them. Jbeyerl (talk) 13:00, 27 March 2017 (UTC)

Euler Brick and the Perfect Euler Brick

Hello Joel,

I'm contacting you because I noticed that you reverted the edit to the Euler Brick article because of the recent change related to a paper by Dr Wyss that purports to demonstrate that no perfect Euler Brick can exist. I agreed with this edit, since Dr Wyss's paper has not been published in a mathematics journal. Now, on an email server, a man named Randall Rathbun has announced that he believes Dr Wyss's proof to be correct. This has led other editors to reinstate some of the changes that declare that the question has been answered mostly because they believe that Rathbun's assertion is a reliable source confirming the proof. I have a B.S. degree in Applied Mathematics from Cal Poly San Luis Obispo, and an M.S degree in Mathematics from the University Of Arizona. I've long had an interest in this problem. So as you might imagine, I decided to read Dr Wyss's paper.

As far as I understand the essence of Dr Wyss's proof is that he starts with a parametric formula for Rational Leaning Cuboids (that since an Euler Brick is a special case of a Rational Leaning Cuboid) and proves that his parametric formula cannot produce a perfect rational cuboid. I did not see an error in his mathematics but I have a very serious question about his proof. In his proof he does not show that his parametric formula produces ALL rational Cuboids. If it does not, he cannot conclude that no perfect Euler Brick exists.

These possibilities exist: 1. I am incorrectly characterizing his logic, and have real egg on my face. 2. It has already been proven the the parametric formula does produce all rational cuboids, and he referenced it and I missed it, or didn't feel he needed to reference it. 3 It hasn't been proven so his proof is invalid until he proves it.

None of my analysis matters for a Wikipedia article (unless I am considered an authority and post my analysis to a mailing list), but I am just pointing out a serious concern. In conclusion, I am of the opinion that we should revert these edits until his proof has been published in a mathematical journal. It seems there are other editors who disagree. Since you seemed to be one of the editors who was hesitant to allow the edits until publication of the proof, I am writing to you. I think we need to bring this to the attention of the larger community of mathematics editors in order to see if we can reach consensus not about the validity of the proof but about its inclusion before traditional verification.

Thank you for reading this far, what are your thoughts?

TheRingess (talk) 17:18, 15 March 2017 (UTC)

Hi TheRingess,

(I hope you don't mind, I have removed some blank spaces in your message so that I can more easily scan it while I respond. If this bothers you, please feel free to change it back.)

I only glanced over the Wyss paper, but my impression was the same as yours. In fact my initial feeling was that no proof like this could possibly be correct, for exactly the reasons you mention. But as I say, I have not read the thing carefully enough to confirm that what appears superficially to be missing, actually is missing. I also read the Rathbun posting, but I did not find its summary particularly convincing, as it also seemed to avoid the relevant issue. (I don't think anyone doubts that Wyss, who is obviously not a crank, can correctly manipulate algebraic equations, after all.) So, I agree with all your qualms, and would prefer that Wikipedia report only that there is a claimed proof and a claimed verification, not that the question is settled, until the proof is published. (Is there any reason to believe that the proof actually has been submitted to a journal, incidentally?) I would be happy to add my comments to this effect to any talk page where you think it would be helpful, although I think I've decided that I have only a limited amount of energy to devote to this particular question.

All the best,

JBL (talk) 20:25, 15 March 2017 (UTC)

Joel thank you for the quick reply. I am glad to know someone shares my doubts about the proof. I don't know why he wouldn't submit it to a journal first, since it is a well known problem so credit for solving it will certainly enhance anyone's reputation. So my guess is that he hasn't. My guess is that he posted it on the archive, so that should anyone else use his results and discover a proof, he can claim co author credit (although that's risky, since if anyone else who comes up with a valid proof based on that particular parametric formula may not be ethically obligated to give him credit.) That's why I don't understand his publishing on the archive, he runs the definite risk of someone stealing his thunder (so to speak) by completing the proof. However, it's just my opinion that his parametric formula will not generate all Euler Bricks. The existence of a parametric formula that generates all Euler Bricks may actually be an unresolvable question. I too am thinking that I have a limited amount of energy to devote to this question, so if I do bring it to a larger audience I will certainly send you a link with no obligation to participate.

I was first introduced to this problem in the late 80s. I have been thinking about how to solve it off and on since then (obviously with no result). I've tried to computer searches as well as attempts at proof of non-existence. A proof of non-existence will probably have to be a proof by contradiction. I must admit that for a very mysterious reason why I have a vested interest in seeing someone find a perfect box. Around '96 or '97 a mystery person emailed me hinting at the existence of a Perfect Euler Brick. They never gave me a real name. Their hints contained enough mathematical jargon that I did not immediately dismiss their claims. Our email exchanges only lasted for a month or so. In one email, that I sent around my birthday on October 28th, the mystery person claimed to have that same birthday. They claimed that the sides of the Perfect Euler Brick measured in the Quintrillions (that's a detail that has remained with me since then, as it is oddly specific). If they are right, then probably no computer search will finish. Of course, the conversation left me a little deflated, as I had hoped to be the first. So if ultimately if someone proves non existence, then my chains were being yanked or if someone finds it I think that the answer will be the quintrillions. For better or worse, I am scanning old files trying to see if I saved the hints, but it looks like I didn't. Time has erased from my memories those hints. So I definitely prefer that someone finds one, so that I wasn't being duped.

Thanks for reading. Take care.TheRingess (talk) 22:36, 15 March 2017 (UTC)

TheRingess, looks like your hesitation was sensible! --JBL (talk) 22:37, 22 March 2017 (UTC)

Pythagoras

Sorry Joel, mistaken edit submitted while I was still working on something. I appear no longer to have a Sandbox, any ideas at how to test and work on edits before submission? AirdishStraus (talk) 14:08, 4 April 2017 (UTC)

Hi AirdishStraus, it is easy to create new sub-pages of your user page. For example, if you click on this red-link you will be at the page [[User:AirdishStraus/pythagoras]] (currently non-existent, so you will have to add some content). But in fact you do seem to have an extant sandbox, here. --JBL (talk) 20:28, 4 April 2017 (UTC)

Hi Joel, many thanks. AirdishStraus (talk) 11:51, 5 April 2017 (UTC)

Regarding Omics

Hi Joel, I do not see what the problem is with including glycomics in the introduction. I am a chemical biologists working in the field of glycomics and it is a very important field which is gaining light recently. In fact, big universities all over USA and Europe have a carbohydrate or glycomic research center. For example, UCSD, Harvard, Emory, Johns Hopkins, Cleveland Clinic, Imperial College London etc. I will not undo the change but I leave it to you.Coolakul (talk) 17:23, 18 April 2017 (UTC)

https://en.wikipedia.org/w/index.php?title=Taylor_series&oldid=prev&diff=776283206

Hi Joel, do you mind to explain how "adds sub-headings for the TOC and for enabling deep-linking" is "Not an improvement".

We are in the Internet, after all, and one of its vital parts is the possibility to link to content from anywhere around the world. (That's also why we have the 'H' in HTML.) With your revert you destroy the possibility for all users:

1. to see in the page's TOC what's exactly on that page at first sight
2. to deep-link to a section they are especially interested in

I'm terribly sorry, but I consider this "Not an improvement" at all. Kind regards, --Gerold Broser (talk) 20:30, 20 April 2017 (UTC)

Gerold Broser, I am not happy with the state of the article after your edit, but it is easy enough to preserve the aspects you like while also making myself happy, so I will do that now. Best, JBL (talk) 17:35, 29 April 2017 (UTC)

Joel B. Lewis, thank you for your cooperation and your understanding. Regards, --Gerold Broser (talk) 20:05, 29 April 2017 (UTC)

Re: Abby Johnson (activist)

Hi Joel, I read your notes on the Abby Johnson page. I disagree with your argument about the term "anti-abortion." While it is an accurate term to describe the pro-life movement, it has far narrower a meaning, and is much more negative than the preferred umbrella term of "pro-life." Being pro-life also includes supporting life from conception to natural death. This would also include the death penalty and assisted suicide. While Abby's main focus is on the abortion industry, it is not fair to disregard other parts of the movement by using the term "anti-abortion." — Preceding unsigned comment added by Erink1993 (talk • contribs) 02:20, 2 May 2017 (UTC)

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Precious

gentle math

Thank you for quality contributions to articles on math based on scientific background, such as improving Q-Vandermonde identity, and with detailed gentle edit summaries, for points about applied stats, - Joel, you are an awesome Wikipedian!

--Gerda Arendt (talk) 08:34, 9 May 2017 (UTC)

Dear Gerda Arendt, thank you very much for the kind message! It is warmly appreciated. Kind regards, JBL (talk) 23:06, 9 May 2017 (UTC)

A year ago, you were recipient no. 1651 of Precious, a prize of QAI! --Gerda Arendt (talk) 05:53, 9 May 2018 (UTC)

William Happer

A complaint about the negative nature of the Climate Change section of this BLP was made at the BLP noticeboard. I reviewed the section and removed one statement that appeared to be referenced to a blog. The rest of it looked strongly sourced to me. I wanted to let you know because you've done a lot of recent, (and good,) work on cleaning up that section. Thanks! Sperril (talk) 21:55, 11 May 2017 (UTC)

Hi Sperril, I appreciate the note. I agree that the sourcing of the statement you removed is weak. Thanks for the kind words! --JBL (talk) 22:00, 11 May 2017 (UTC)

Simple Observation on Prime Gap

I see you've reverted my addition of a sentence to the Prime gap page: "An arbitrarily large prime gap of size n can always be found starting at (n+1)!-(n+1)." You said that this was redundant. However, it's a simple observation about finding a specifically-sized prime gap in a specific location. And this prime gap is easier to compute than the one at P#+2,P#+3,...,P#+(Q-1). It's also a different gap.

Maybe saying "Another prime gap of size n can be found starting at (n+1)!-(n+1)" would be acceptable? (It's different because P# is different that n! - and P# is also harder to calculate than n!). Do you think that's a different enough observation to include in the article?

--MDWeathers (talk) 22:17, 15 May 2017 (UTC)

Hi MDWeathers, sorry for the delayed response. It is redundant in the sense that both give elementary constructions of prime gaps of arbitrarily large size, and are otherwise not important. The primorial construction has one advantage: it finds the gap much earlier. However, it is not optimal in any sense, so it's not clear why that matters much. I agree with you that the simpler n! construction has an obvious advantage that it's easier to understand. (I also think it's probably easier to find supporting citations for.) I am not likely to have time to do this in the next few days, but I think it would be better to replace the primorial argument with the factorial argument, at a similar level of detail (and with a citation if possible). I still think it's silly to have both appearing together. --JBL (talk) 16:30, 22 May 2017 (UTC)

Exponential response formula

Hello Mr @Joel B. Lewis:. It feels you are good in math. Could you please have a look on article we are working on and give us few hints how can we improve it? Wandalen (talk) 07:02, 4 June 2017 (UTC)

Hi Wandalen,

I have a few comments for you about the article. First, as you've expanded it, it has come to resemble more and more a section of a textbook. This is not the goal of Wikipedia, and it's something you should keep in mind as you work on it. Second, your mastery of English is not perfect, and you at some point might want to see if you can find a native English speaker to help you edit the article for grammar and idiom. (You might also run the article through a spell-checker.) Third, I think you should consider the comments from other users about merging this article with another one -- sometimes it really does make more sense to explain extremely closely related concepts together, rather than in separate articles. This is particularly the case if it means you can attract more editors to work collaboratively with you, in the cooperative spirit of WP. Finally, I do not think the introductory paragraph currently does a good job of summarizing the contents of the article -- there are some claims made there that are not anywhere in the body (and maybe are not supportable by sources), and the next-to-last sentence doesn't really seem to have anything to do with ERF at all.

Hope this helps,

Joel

P.S. It is never necessary to ping a user on their own talk page.

Blocked or Not?

Did you block Widr or are you not an administrator or did you just add == IP you block == on purpose? --Carmen Melendez (talk|contribs) 22:14, 12 June 2017 (UTC)

I did not block Widr, I am not an administrator, and I added that section to alert Widr to the behavior of a non-logged-in user who Widr had recently blocked. What is the point of these queries? --JBL (talk) 22:30, 12 June 2017 (UTC)

Decision stream

Dear Joel,

The efficiency/uniqueness of Decision stream technique was demonstrated in the several labs. Could you be so kind to revert you last changes related to this topic (or inform us and we'll restore text). — Preceding unsigned comment added by 62.119.167.36 (talk) 14:23, 21 June 2017 (UTC)

Dear 62.119.167.36, you have recently been posting references to a single paper across a wide variety of Wikipedia pages. Unfortunately, this behavior is not in accordance with the rules and policies of Wikipedia. To quote myself:

Wikipedia is not an appropriate venue to publicize brand-new research. The concept of decision stream might be an excellent one; if so, it will be adopted and studied more widely in the relevant academic community, papers about it will be published by authors other than its inventors, and it will become possible to write a well sourced article on the topic and link it from other Wikipedia pages. But now is too early.

Best, JBL (talk) 16:02, 21 June 2017 (UTC)

Hi Joel,

The article 'Decision Stream: Cultivating Deep Decision Trees', which is published on arXiv - currently in the top rate of Google search. Looks like you the only man in the world, who actively moves against this idea supported by community. — Preceding unsigned comment added by 46.39.231.142 (talk • contribs)

Hi @46.39.231.142:, I am glad that you are pleased with how the arXiv paper is doing on Google. Nevertheless, it is not appropriate to try to promote a new preprint by repeatedly linking to it in Wikipedia. Also, you surely know as well as I do that arXiv is not a publisher, it is a preprint repository, and the fact that work appears there is not a particular indication of correctness, importance, or acceptance by the community. (Of course, the same is true for my own arXiv postings as well as yours!) --JBL (talk) 20:16, 26 June 2017 (UTC)

Dear Joel,

It's good to see that the topic is closed in 'WikiProject Mathematics'. But, our guys are worried about the image of the technology. Due to the fact that it was misunderstanding (not spamming), could you be so kind to change the title 'Aggressive spamming of a recent arXiv posting, "decision streams"' to 'Decision stream references discussion' on page https://en.wikipedia.org/wiki/Wikipedia_talk:WikiProject_Mathematics.

Thanks, AlexNet22 (talk) 18:13, 5 July 2017 (UTC)

If an algorithm...

...takes zero time for every recombination step, and if further the elementary operation can be done in no time (ie. $T(n)=0$ for $n\leq k$, borrowing the notation of the article), the algorithm has zero running time, and is in ptic. not in $\Theta (n^{c_{crit}})$.--Mathmensch (talk) 15:02, 21 August 2017 (UTC)

That is, please re-revert! --Mathmensch (talk) 15:05, 21 August 2017 (UTC)

0 is big theta of everything (with constants 0). But even if it weren't, this is a stupid and uninteresting boundary case and the correct way to resolve it would be to somewhere make sure the technical hypotheses include that either f or T is positive. --JBL (talk) 15:07, 21 August 2017 (UTC)

Mathematics is annoyingly precise. And acknowledging and correcting one's mistakes is of supreme importance. --Mathmensch (talk) 15:10, 21 August 2017 (UTC)

I see you misunderstood the $\Theta$ notation. It means bounded below and above (cf. Knuth p. 110). --Mathmensch (talk) 15:12, 21 August 2017 (UTC)

Don't be an ass. If you think functions being 0 is allowable in this context then the only reasonable definition of big theta allows 0 constants, with 0 big theta of everything. If you don't think 0 constants are allowed then you are tacitly admitting that you live in a world where the 0 function is not allowed. These technicalities are not interesting or important, and linking to a blog by a person who was my student when he was an undergraduate is a particularly nice demonstration of how misplaced your condescension is. (As if the title of a blog were evidence of something! I can't believe I'm actually writing this.) If you think it is really, really, really important to note that algorithms generally are assumed to take a positive number of steps, you can find a relevant reliable source and add a small comment about it somewhere unobtrusive in the body of the article. On the other hand, changing the well sourced and correct theorem statement to something weaker because you think you are clever is a terrible idea.

You are not welcome to reply further on this page. --JBL (talk) 15:28, 21 August 2017 (UTC)

ALBERT EINSTEIN'S MOUSTACHE WAS FAKE!!! — Preceding unsigned comment added by Antiseismographite (talk • contribs) 11:54, 25 August 2017 (UTC)

WP:TPO

If it is simple, then why are you unable to read WP:TPO? — nihlus kryik  (talk) 22:42, 27 August 2017 (UTC)

The relevant sentence is "If in doubt, ask the editor in question to update their own post, or add a follow-up comment of your own suggesting the alternative link." The context is a user who obviously does not want you to edit their post, and who was extremely explicit about this. --JBL (talk) 22:47, 27 August 2017 (UTC)

I had no doubt. — nihlus kryik  (talk) 22:49, 27 August 2017 (UTC)

After being told to "leave my posts alone"? You've got a serious problem, then. Also, to remove all possibility of misunderstanding going forward, you are not welcome to post further comments here on this subject. --JBL (talk) 22:53, 27 August 2017 (UTC)

MDPI journal entry

Hello. On the MDPI page, I noticed your revert and of course your question in the edit history. I answered it on the article's talk page because I am guessing other editors who work in the Academic Journals area would also be wondering about it. Here is the diff for that section [3]. Just so you know, your edit is correct. ---Steve Quinn (talk) 21:51, 10 September 2017 (UTC)

Big O caveat for multiple variables

Hello. You reverted my addition to the section of the Big O notation page about a definition for multiple variables. If I understand your rationale correctly, you are saying that we get the same behavior in the univariate case. But I do not think this is true. If $f(n)=1$ and $g(n)=n$, then $f(n)=O(g(n))$ (as $n\to \infty$), regardless of whether $f$ and $g$ are defined on $[1,\infty )$ or on $[0,\infty )$. But in the multivariate case, if $f(n,m)=1$ and $g(n,m)=n$, then $f(n,m)=O(g(n,m))$ if we restrict $f$ and $g$ to $[1,\infty )^{2}$, but not if they are defined on $[0,\infty )^{2}$, at least under the definition stated in the article. Please let me know if I have misunderstood you or what I have not explained clearly. Thanks. Germyb (talk) 20:19, 8 October 2017 (UTC)

Hi Germyb,

Apologies for the delayed response and thank you for the comment (although perhaps it would have been better placed on article talk page. Yes, I see your point. I guess the ultimate issue here is that the "correct" notion of big O for multivariate functions is not necessarily clear, which explains why this example is possible, and perhaps also why that section of the article is in pretty poor shape. I would not object if you restored your text to the article.

Best,

JBL (talk) 01:51, 26 October 2017 (UTC)

Okay, and thanks for the tip. I'm still getting acquainted with Wikipedia editing practice. But yes, if the section did not treat this particular definition as primary, I wouldn't necessarily care as much about including this caveat. Germyb (talk) 15:55, 2 November 2017 (UTC)

Partial derivative expressions and Refdesk Math

Hi, JBL! Thanks again for your very enlightening reply from WP:RD/MA about partial derivative expressions. You said there about some other concerning beside the nonstandard ratio variable to be held constant (x₁/x₃) as if a pseudo-ordinary variable. Please identify the other problematic aspects on talk:Gibbs-Duhem equation. (In order to attach a scanned page from that textbook containing formula, is it necessary to be registered?)--82.137.15.34 (talk) 11:07, 25 October 2017 (UTC)

Perhaps these non-trivial/non-standard aspects of the use of partial derivatives in the context of math-based sciences aka applied mathematics like this one connected to the Gibbs-Duhem equation could be presented and analyzed (as examples) at Partial derivative. How do you consider this?--82.137.15.34 (talk) 11:42, 25 October 2017 (UTC)

I have responded there. --JBL (talk) 01:57, 26 October 2017 (UTC)

Reference Desks/StuRat

Hi Joel, in response to your comment on the Village Pump vote, I suppose it might be worthwhile to open another case about StuRat at ANI. The last time I did that, it was kind of a joke, but maybe if I treated it seriously other people would take it seriously as well. I do sincerely believe that there would be no problems with the Reference Desks at all if StuRat was blocked from editing it (and perhaps Baseball Bugs, but one problem at a time). Now that we've gone so far as to vote to delete them entirely, maybe it is time to do something about StuRat specifically. I don't want the RDs to disappear but they obviously can't go on like this. I'll start a report, if you're on board. Adam Bishop (talk) 17:59, 27 October 2017 (UTC)

Hi Adam Bishop, I think there is clearly a large body of people who think that StuRat is extremely problematic -- I see Iridescent is another person who explicitly called for blocking him, but surely many of the references to a small number of problematic users are about him. I would certainly support a serious attempt to make it happen. My beef is particularly about the mathematics desk (the only part of RD that I frequent) -- here are a few examples of terrible answering behavior that I happened to have noticed: this answer is utterly unrelated to the question, which had already been completely answered by someone else; this discussion involves StuRat requesting information about someone's medical history (!!) while giving deeply inappropriate personal advice on a subject about which he is not expert; here we have aimless incoherent ramblings being posted after a question has been entirely answered, with reference, by another user; here we have two comments that show a total failure to understand the important parts of the problem (though at least the rambling was limited to two short posts); here a question asker had to explain to StuRat that a math problem inspired by a military analogy requested a mathematical solution rather than inventing military strategies; and here we have StuRat inventing terminology in response to a question asking for standard names. Please let me know if/when you file; I will gladly add my own summary of his contributions to RD/MA. --JBL (talk) 00:47, 28 October 2017 (UTC)

Great, thanks! I just submitted it - Wikipedia:Administrators'_noticeboard/Incidents#StuRat.27s_behaviour_on_the_Reference_Desks_.28again.29. I suspect it will go about as poorly as these things always do, but there it is. Adam Bishop (talk) 17:17, 28 October 2017 (UTC)

@Adam Bishop:, quite the contrary, it seems -- thanks again for getting this going! --JBL (talk) 21:49, 31 October 2017 (UTC)

You're welcome - I honestly did not expect that outcome at all. Adam Bishop (talk) 01:05, 1 November 2017 (UTC)

Orthogonal Complement

Hi Joel, you have reverted this image of orthogonal complement:

I think it's better to keep the image on that page because if a student looks at the picture maybe he see what it's suggesting:

This is saying how to solve any system of linear equations with the orthogonal complement I think it's a good application of the orhogonal complement. Please consider again include that image Thanks — Preceding unsigned comment added by Solinruiz (talk • contribs) 03:41, 3 December 2017 (UTC)

Hi Solinruiz,

Unfortunately I do not think your image is suitable for Wikipedia. One reason is that it makes no sense to write a bunch of text, put it in an image, and then put that image as an illustration in an article: the text of Wikipedia articles should be written as text, not as images. A second is that you dropped your image in at seemingly random locations in the articles, without any sense of how it fit into the larger article. Possibly the articles you were editing would benefit from additional examples; but if so, those examples need to appear in a sensible place in the text, related to what comes before and after. If you find a place in an article where an extra example would be helpful, I'm sure I or someone else could help with any formatting issues.

All the best, JBL (talk) 16:07, 3 December 2017 (UTC)

Thanks for your answer, Joel, sorry. — Preceding unsigned comment added by Solinruiz (talk • contribs) 16:16, 3 December 2017 (UTC)

Dear Solinruiz, no apologies necessary -- I hope you will continue to add to Wikipedia! It is definitely true that many mathematics articles need good examples added -- but it can take some time to get used to the culture here. All the best, JBL (talk) 16:56, 3 December 2017 (UTC)

Hi Joel, if you dislike that example don't worry, "De gustibus non disputant" or "There is no arguing about taste". Drop an example after a definition do you really think it is without any sense?. The image at gallery too? Do you prefer drop it on the video-link? I think that you don't appreciate that example. Don't worry the article is okay without that image. In the other hand I agree with you on the first reason. Thanks for your advice. All the best. — Preceding unsigned comment added by Solinruiz (talk • contribs) 10:11, 4 December 2017 (UTC)

ArbCom 2017 election voter message

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Question

If I look to the list of your contributions, I can see that lately most of your contributions are just 'REVERTS'. Would you consider to be little more constructive with your criticism and improve the contributions instead of just reverting things which you do not like?

I explained here: https://en.wikipedia.org/w/index.php?title=Birthday_problem&diff=817764354&oldid=810618335 that "This is an alternative point of view, the previous solution is combining probability of events .... and this solution is getting just one probability by dividing amount of unique ways by total amount of possible ways when they can have birthday!"

Later it was removed by Numbermaniac because: "it breaks the whole flow"

So I improved it and introduced it as a separate section, which you removed again.

And I personally believe that excel example is much more useful and easier to understand and to play with to general population than the plain table with values.

Thank you very much for reply. — Preceding unsigned comment added by Cruiserupce (talk • contribs) 01:51, 31 December 2017 (UTC)

@Cruiserupce: the correct place to discuss this is on the article talk page. --JBL (talk) 17:09, 31 December 2017 (UTC)