User talk:Lambiam/Archive 25

FYI
Hello L. You forgot to sign this answer at the ref desk. I don't know if sinebot will get it or not so I thought I'd let you know. I thank you for your input at the r/d's and have learned some interesting things over the years. Cheers. MarnetteD&#124;Talk 07:05, 21 February 2020 (UTC)
 * Thanks, now signed. --Lambiam 07:53, 21 February 2020 (UTC)
 * You are welcome. MarnetteD&#124;Talk 07:55, 21 February 2020 (UTC)

Lang ref. desk
Sorry for the problems in the "English derivatives of Greco-Latin feminine -o nouns with -us in genitive" section, but since the stupid encryption protocol upgrade in December, I'm sometimes forced to use tools which are not fully Unicode compliant... AnonMoos (talk) 21:04, 11 March 2020 (UTC)

Hello again
If you are interested and speak Turkish, I'd welcome your comments at Talk:Halime_Hatun. Gråbergs Gråa Sång (talk) 08:10, 13 March 2020 (UTC)

Help with protest at Change.org
Please, promote or share a petition for me at the Change.org website. (www.change.org/p/heather-davie-abolish-school-uniform-worldwide) (www.change.org/p/heather-davie-abolish-school-uniform-worldwide/dashboard?source_location=user_profile_started) 86.128.175.64 (talk) 20:19, 25 April 2020 (UTC)
 * Wikipedia is not meant to be used for canvassing. --Lambiam 20:22, 25 April 2020 (UTC)

"L2 norm" listed at Redirects for discussion
A discussion is taking place to address the redirect L2 norm. The discussion will occur at Redirects for discussion/Log/2020 June 11 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. Pandakekok9 (talk) 11:55, 11 June 2020 (UTC)

Henry VIII's letter about Catherine Howard's adultery
In the 4th episode of the final season of The Tudors, the letter about Catherine's sexual relationship with Dereham was delivered to the king. And in the next episode when the king asked Edward Seymour what the letter says, he did not read it in full and was not read in voice-over either. He just said "The letter accuses Queen Catherine of dissolute living before her marriage to your majesty." (https://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Humanities#Henry_VIII's_letter_about_Catherine_Howard's_adultery) 86.129.17.70 (talk) 20:38, 15 June 2020 (UTC)

"European discovery of America" listed at Redirects for discussion
A discussion is taking place to address the redirect European discovery of America. The discussion will occur at Redirects for discussion/Log/2020 July 6 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. Steel1943 (talk) 22:08, 6 July 2020 (UTC)

Something funny
Hey Lambiam, I just saw something funny that I though you might appreciate. Your WP:RDMA edit of 12:23, 21 July 2020 led me to Bound variable which at the time contained:
 * In the expression (undefined at $$h=0$$)
 * $$\lim_{h\rightarrow 0}\frac{f(x+h)-f(x)}{h},$$
 * x is a free variable and h is a bound variable; consequently the value of this expression depends on the value of x, but there is nothing called h on which it could depend.

Ha!

I figured the parenthetical addition had to be a subtle, sophisticated troll, but I traced it down to this edit by FritzYCat(talk), (now indeffed for NOTHERE due to a series of edits elsewhere), and looking though their edits I'm not sure any more. Perhaps they were just clueless.

Cheers! -- ToE 13:40, 24 July 2020 (UTC)


 * Perhaps the user is NOT all THERE either. Their mainspace edits seem to be in good faith, but too often exhibit a lack of competence, both with respect to the content and stylistically. --Lambiam 15:05, 28 July 2020 (UTC)

Guideline on Medical Advice
You have been a significant contributor to Reference desk/Guidelines/Medical advice. On 9 April 2020 a User took action to demote that document from a guideline to an essay. See the diff. The matter is now under discussion at Wikipedia talk:Reference desk/Guidelines/Medical advice. You may wish to contribute to the discussion. Dolphin ( t ) 13:03, 10 August 2020 (UTC)

Fast way to determine if is squarefree
At the RD you wrote, "$$\mu(n) = 0$$ if and only if $$n$$ is square-free." Did you mean "$$\mu(n) \neq 0$$ ..."? Cheers! -- ToE 12:47, 16 August 2020 (UTC)
 * Yes, of course. Thanks, fixed. --Lambiam 16:56, 16 August 2020 (UTC)

Is there a largest possible prime number?
At the RD you wrote, "Among the ten largest numbers known to be prime only two are Mersenne primes."

No. Only two of the ten most recently discover primes among the currently known twenty largest primes are Mersenne primes, but nine of the ten largest (and twelve of the thirteen largest) are Mersenne primes according to Largest known prime number. Check your sort order on that table. Cheers! -- ToE 22:55, 17 August 2020 (UTC)
 * Thanks again. I cannot reconstruct what I was looking at – I double-checked because it was unexpected, but apparently I should have triple-checked. --Lambiam 05:44, 18 August 2020 (UTC)

Odds
Odds of the US Army and police siding with Trump: zero, since there's no evidence of significant voter fraud, and neither organization has a history of ever doing anything remotely like that.

Odds of the Jets winning the Super Bowl LVI: infinitesimally greater than zero. If Leicester City F.C. and Buster Douglas can pull off a mind-boggling upset, so can the Jets. Clarityfiend (talk) 05:44, 17 November 2020 (UTC)

High technology, neurons
Hello, I'm the one who posted the question here https://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Archives/Science/2020_November_12#High_technology.2C_neurons, could you help me please to write the missing part about my process, the one about the measurement of the threshold of excitability of the synapses as defined by MarcoPB, please ? 2A01:CB0C:38C:9F00:8448:33D0:6CCA:D9F8 (talk) 21:02, 5 December 2020 (UTC)


 * What you want to do is not possible with current technology. The current state of neuroscience is not nearly far enough to even begin to devise a process that might work with future, not-yet developed technology. Filling in "the missing part" may require the sustained efforts of thousands of research scientists during a period spanning several decades. Good luck. --Lambiam 22:29, 5 December 2020 (UTC)

Apologize
Hey there, a few days back I said something rather nasty to you at WP:RDH regarding a rather minor disagreement we had over the use of words like "tribal" and "national" and you really didn't deserve that. I just wanted to let you know that it was rude, I have no excuse for it, and you didn't deserve it. I'm really not proud for having said it, and wish to apologize for it. I'm sorry and you deserved better. -- Jayron 32 20:27, 21 December 2020 (UTC)
 * OK, apology accepted; case closed. --Lambiam 21:36, 21 December 2020 (UTC)

Speedy deletion nomination of Category:Journalists killed in Ireland


A tag has been placed on Category:Journalists killed in Ireland requesting that it be speedily deleted from Wikipedia. This has been done under section C1 of the criteria for speedy deletion, because the category has been empty for seven days or more and is not a disambiguation category, a category redirect, a featured topics category, under discussion at Categories for discussion, or a project category that by its nature may become empty on occasion.

If you think this page should not be deleted for this reason, you may contest the nomination by visiting the page and clicking the button labelled "Contest this speedy deletion". This will give you the opportunity to explain why you believe the page should not be deleted. However, be aware that once a page is tagged for speedy deletion, it may be deleted without delay. Please do not remove the speedy deletion tag from the page yourself, but do not hesitate to add information in line with Wikipedia's policies and guidelines. Liz Read! Talk! 15:36, 25 January 2021 (UTC)

Um, your answer about average length of day is wrong
September equinox 2020 to March equinox 2021 is under 178.84 days, half year is 182.6211 or 182.625, so even if the Sun was an infinite or real life distance point and Earth was an airless sphere the North Pole would still have less than 48.99..% night. Standing on the surface, global average refraction would reduce night to under 48.5% and the world's highest refractions are in polar regions (Novaya Zemlya effect, up to 10 times normal refraction). Sagittarian Milky Way (talk) 15:32, 25 February 2021 (UTC)
 * Without atmosphere, the effect of atmospheric refraction is negligeable. --Lambiam 17:41, 25 February 2021 (UTC)
 * Very true but at the North Pole even an unrefracted point Sun is only in the "down hemisphere" on the polar night side of the equinoxes. These seasons are <49% of the year (whether the rays are parallel or not). Sagittarian Milky Way (talk) 19:28, 25 February 2021 (UTC)
 * I wrote that I took Earth's orbit to be circular, which should make the periods between equinoxes equally long. But even for an elliptic orbit, on the long run the precession of the equinoxes should even out the effect. --Lambiam 20:28, 25 February 2021 (UTC)
 * You said you did so because it didn't matter due to the length of a year not being synchronized with the length of a day (I can only guess what you meant but it doesn't seem to be a valid spherical cowization excuse like how the later "it's 50/50 if you average over a good enough cycle" is). Even a whole number of Milankovitch cycles of apsidal precession (variable 20.8-29 millennia, avg: 23) is not this ultimate cycle of everything as ellipticity at time x is ~0-5 times today depending on the net result at least 3 superimposed cycles: primary 413 millennia, secondary 95 and 125 millennia, even if 95 and 125 has been rounded to the nearest 5 millennia and 413 to the nearest 1 millennium the lowest possible common multiple/recurrence time for the amount of ellipticity is 3712.5 millennia. It'll probably be within the OP's 49-51% to 49.95-50.05% before having to average for 3.7125 million years but not half except by coincidence. Sagittarian Milky Way (talk) 22:15, 25 February 2021 (UTC)

Your strip rounds up to 0.005 radians wide but is nearly 2pi radians long. This is without refraction. Sagittarian Milky Way (talk) 00:59, 26 February 2021 (UTC)
 * Yes? With a unit radius, that is a difference of ± 0.005×2π on the areas of the two hemispheres, each having size 2π. Hence, 1.005 : 0.995. --Lambiam 07:54, 26 February 2021 (UTC)
 * Ah yes, forgot about the 12.57 square radians. So that's why it looked too big. Sagittarian Milky Way (talk) 14:34, 26 February 2021 (UTC)

‎Irmgard Hörl (1927-1973)
Thank you very much about "Maximilien de Robespierre". Can you also find information about that female professor's live?
 * I looked, but found very little. Her (typewritten) doctoral dissertation (Universität München 1952) was entitled Die Zusammensetzung und Schichtung der ältesten Münchner Bevölkerung. (Von 1158, dem Gründungsjahr der Stadt, bis 1403, dem Jahr der Neuordnung der Stadtverfassung.)&thinsp;, p. 24. In those days, a married woman in Germany would generally adopt her husband's surname, so any later records of her life might refer to her as Irmgard Müller or Irmgard Schmidt or whatever, making searching very difficult. --Lambiam 12:05, 2 April 2021 (UTC)
 * If you found something other, can you create her page? Maybe you can also begin it with dates of birth and death, university faculty, doctoral dissertation, activity in Munich, and the François de Robespierre's grave. Thank you very much.
 * I'm sorry, but even if there is more material beyond this, I very much doubt that such an article could pass the notability requirements. They require significant coverage in multiple published sources. --Lambiam 12:56, 2 April 2021 (UTC)
 * Then, can you only find if there is more material beyond this? Thank you very much. — Preceding unsigned comment added by 79.16.39.71 (talk) 13:28, 2 April 2021 (UTC)
 * Please, can you find the school where she worked in 1956, when she discovered Robespierre's grave, and the cemetery where she is buried? Thank you very much. — Preceding unsigned comment added by 193.207.212.47 (talk) 20:38, 4 April 2021 (UTC)

(en Esperanto)
Saluton, tio est'as Þþanon, (tio est'as mi kiu far'is tio'n https://www.youtube.com/watch?v=Ieuc3ABCMMA ) mi ver'e bezon'as help'o'n je iu por skrib'i leter'o'n por pet'i aŭ program'ar'o'n je simul'ad'o je biologi'o aŭ spert'o'n, je meduz'o , je mal'kompon'o je ĝi'a cerb'o. Mi fid'as je vi, bonvolu. 2A01:CB0C:38C:9F00:61DF:2B97:B897:6B74 (talk) 23:30, 23 April 2021 (UTC)


 * Mia konsilo al vi estas trovi alian projekton. Ĉi tio tro malproksimiĝas de la limoj de scienca progreso. --Lambiam 07:45, 24 April 2021 (UTC)

Cat in Star Trek Discover
I found out the kind of Maine Coon in Star Trek Discovery is a brown classic tabby: https://www.dailystartreknews.com/read/say-hello-to-star-trek-discoverys-newest-cat-member-grudge 2001:569:7D97:D200:94D5:34AE:EC47:293D (talk) 06:29, 1 May 2021 (UTC)

Fortress
Per wikipedia guidelines, is it more suitable to use a hyperlink of "Dhulbahante fort" than "Dhulbahante garesa" to link to the section on Caroselli's quote on Taleh page, considering the latter is a non-English word, or are they equally plausible? Heesxiisolehh (talk) 02:38, 12 June 2021 (UTC)
 * I see now that Caroselli's quote occurs even three times. I fixed the first one but not the others. There are some serious problems with the use of this quote. Unlike what is stated several times, the quote by Caroselli does not identify the builders of these garesas or "define" them as "Dervish forts"; all we can infer is that they were in the hands of the Dhulbahante. I am not sure from where you want to link to where. --Lambiam 08:30, 12 June 2021 (UTC)


 * The issue of the garesas has resurfaced on the Dervish movement (Somali) page. Could you please confirm the paragraph I added here on garesas is accurately translated? Heesxiisolehh (talk) 00:49, 4 December 2021 (UTC)

Proposed deletion of Constant term


The article Constant term has been proposed for deletion&#32;because of the following concern: "Unsourced, and brings nothing beyond what is specified in article Constant (mathematics)"

While all constructive contributions to Wikipedia are appreciated, pages may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the page to address the issues raised. Removing will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. DVdm (talk) 17:38, 23 June 2021 (UTC)

New article
Hope all is well with you. Started Mimar Sinan Mosque, if you have any brilliant Turkish sources, feel free to improve. Gråbergs Gråa Sång (talk) 19:31, 29 July 2021 (UTC)

"Indian nation" listed at Redirects for discussion
A discussion is taking place to address the redirect Indian nation. The discussion will occur at Redirects for discussion/Log/2021 October 17 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. Hemiauchenia (talk) 23:30, 17 October 2021 (UTC)

Theorem 4
Actually I'm doing a couple of neat tricks.

1. the divisors d1 and d2 must be relatively prime, so when I generate the list of divisors, I also make a bit vector showing what prime factors are in that divisor. Then a quick bit-wise AND of the two bit vectors checks to see if they are relatively prime (i.e., no need to calculate the GCD).

2. The sum d1+d2 has to be a multiple of the numerator, so I also store the divisor mod the numerator, then grouping them by that value, which avoids matching pairs on the divisor list from being quadratic. Bubba73 You talkin' to me? 02:58, 30 November 2021 (UTC)


 * — If all n divisors are different, ℓ = 2n. The number of pairs of coprime divisors equals (3n&thinsp;+&thinsp;1)&thinsp;/&thinsp;2, wich is O(ℓlog2&thinsp;3), still dominating the O(ℓ) process (log2&thinsp;3 ≈ 1.58496).  --Lambiam 19:48, 30 November 2021 (UTC)

Templates in sigs
You really shouldn't be using templates in signatures, as seen in places like Special:Diff/1060874404, per WP:CUSTOMSIG/P. Primefac (talk) 10:03, 18 December 2021 (UTC)
 * Thanks; I wasn't aware of this prohibition (which is widely ignored). I've manually expanded the template so that the signature now only uses parser functions. --Lambiam 12:47, 18 December 2021 (UTC)

Top 1000
3rd link is not en. — Preceding unsigned comment added by 2600:8806:4802:2E00:60C6:878:4325:1AEB (talk) 01:56, 28 December 2021 (UTC)

"User talk:88.111.60.0" listed at Redirects for discussion
An editor has identified a potential problem with the redirect User talk:88.111.60.0 and has thus listed it for discussion. This discussion will occur at Redirects for discussion/Log/2021 December 29 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. User:1234qwer1234qwer4 (talk) 23:38, 29 December 2021 (UTC)