egg|nomz|egg changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer.
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<SnoopJeDi> LOL I didn't realize that scrapy's API is partially built around subclassing Spiders, but I love the idea of a machine-spider army it conjures up
<egg> !u にゃー
<Qboid> U+306B HIRAGANA LETTER NI (に)
<Qboid> U+3083 HIRAGANA LETTER SMALL YA (ゃ)
<Qboid> U+30FC KATAKANA-HIRAGANA PROLONGED SOUND MARK (ー)
<egg> ;8ball was bofh^28 eaten by a moth-bat hybrid
<kmath> egg: Yeah
<egg> ah
<SnoopJeDi> I don't think I've ever seen that reply
<SnoopJeDi> it's gold
<SnoopJeDi> (en)
<UmbralRaptop> Are mothbats more like yttibats or adiabats?
<egg> UmbralRaptop: what about bofhmoths
<UmbralRaptop> egg: set up a lamp, and see if you get a bofh^28?
<egg> hmmm
<egg> good point
<UmbralRaptop> Well, I guess a LAMMPS.
<bofh^28> egg: I guess adiabats,
<egg|cell|egg> Bofh!
* egg|cell|egg pokes bofh with chat and cats
* UmbralRaptop meows at the cats.
<rqou> egg: btw i just asked my dad and he doesn't know how to use that stroke count IME either :P
<egg|cell|egg> Huh
<rqou> we're all lame
<egg|cell|egg> Whereas I know how to use it but I don't speak any language written with it
<egg|cell|egg> 貓喵
<egg|cell|egg> There's also a screen writing mode which works pretty well with a stylus
<egg|cell|egg> Works with HK grass radical stroke order too
<SnoopJeDi> whoa, 貓喵 is a gorgeous construction
<UmbralRaptop> Apparently meowing cats are mongeese?
<egg|cell|egg> Actually the handwriting thing seems weirdly erratic
<SnoopJeDi> UmbralRaptop, as a kanji in Japanese it can mean "carefree" if Google Translate is to be trusted (which is always suspect)
<UmbralRaptop> ¯\_(ツ)_/¯
<SnoopJeDi> although it's nice that machine translation is still enjoying great improvements
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* bofh^28 meows at egg|cell|egg
<egg|cell|egg> zzZmeowzzz
* UmbralRaptop sets a blanket on egg|cell|egg
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<Qboid> 5d 0h 0m 0s left to event #30: [at 2018-10-19 01:45:00]. Say '!kountdown 30' for details
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* icefire squints
<icefire> that looks like 猫 but I don't know what the second kanji is?
<icefire> is that chinese?
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* UmbralRaptop pokes radvel
* UmbralRaptop wonders why the maximum likelihood fitting decided that a planet should have a negative period.
<bofh^28> ROFL
<bofh^28> um.
<UmbralRaptop> (This kills the Markov chain)
<bofh^28> you don't say.
<UmbralRaptop> antisaturn, apparently.
<UmbralRaptop> Well, maybe. Semi-amplitude is 277.52 m/s.
<bofh^28> That seems a bit slow for a planetary orbital velocity?
<bofh^28> wait no that's reasonable I s'pose if the semi-major axis is large
<bofh^28> and you *did* say antisaturn so it prolly is
<UmbralRaptop> No, no, that's the *star's* orbital velocity around the barycenter.
<UmbralRaptop> … this is a 1.32 M_☉ star.
<UmbralRaptop> I think radvel decided to turn this planet into a brown dwarf.
<bofh^28> uhm.
<bofh^28> what
<bofh^28> the hell
<UmbralRaptop> Like, probably 30-60 M_♃
<bofh^28> I think you managed to anger some local Numerics Demigod.
<UmbralRaptop> Probably
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<egg|cell|egg> 喵
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<egg> bofh^28: oh they put a copy of the pendulum back in the original place in 2015 https://www.youtube.com/watch?v=QEoXIei26ns
<kmath> YouTube - Le pendule de Foucault de nouveau suspendu au Panthéon
<egg> (the original being at the arts & métiers)
<bofh^28> Oh nice.
<bofh^28> Also I completely forgot there's an observatory at the Sorbonne that's not the Observatoire.
<egg> lɒl
<egg> !wpn bofh^28
* Qboid gives bofh^28 a galactic demi-cannon which vaguely resembles a weapon
<egg> me stares at Qboid
<bofh^28> rofl
<bofh^28> I guess a demi-cannon would resemble a wepon, hopefully it'd do more than just resemble one...
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<egg> bofh^28: so on second thought my idea of patching the force and integrating back doesn't work, because the force also depends on the angles
<egg> bofh^28: and thus if you just make the radial component fall to a constant you just get a corrugated potential eggstending to infinity
<egg> bofh^28: so instead you want to make the potential fall to 0, but still prevent the force from increasing (it's ok if it doesn't decrease as fast as it should over the falloff segment, but if it goes up something is wrong)
<egg> bofh^28: if the sigmoid applied to the potential is a degree 3 polynomial, that means that the sigmoid must apply for twice the length on which the unscreened force applies
<egg> bofh^28: if it's degree 7, seventy thirteenths (5.4ish) of the unscreened stretch
<egg> bofh^28: if it's erf-based, the criterion is never satisfied :-p
<bofh^28> AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
<egg> bofh^28: :-p
<egg> bofh^28: tbh cubic with twice the unscreened length seems workable
<egg> bofh^28: also
<egg> bofh^28: s/(.*)/dr\1ft/
<Qboid> egg thinks bofh^28 meant to say: dr\1ft
<egg> um.
<egg> bofh^28: s/(.*)/dr$1ft/
<Qboid> egg thinks bofh^28 meant to say: drAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAft
<egg> yes
<egg> bofh^28: s/./double-/g
<Qboid> egg thinks bofh^28 meant to say: double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-d
<Qboid> ouble-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-double-do
<Qboid> uble-double-double-double-double-
<egg> s/badger/double/
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<egg> bofh^28: whitequark: going through my old receipts, a lot of them say "garanti sans bisphénol A"
<bofh^28> egg: and I take it something lower-order than a cubic isn't useful here?
<bofh^28> egg: watch them contain bisphénol S instead, :p
<egg> bofh^28: something lower-order than a cubic wouldn't be C1, thus the force would be discontinuous
* egg meows at bofh^28
<bofh^28> Oh, right, yeah. That's specifically what you're trying to avoid.
<egg> bofh^28: well I'm trying to avoid a few things
<egg> bofh^28: obviously with a discontinuous force there's no point in having a sigmoid to start with, I might as well just drop to 0
<egg> bofh^28: I want the force to stay monotonic as a function of r
<egg> bofh^28: I'm not sure whether I need the force to be C1 thouh
<egg> s/thouh/though/
<Qboid> egg meant to say: bofh^28: I'm not sure whether I need the force to be C1 though
<egg> s/thouh/東方/
<Qboid> egg meant to say: bofh^28: I'm not sure whether I need the force to be C1 東方
<egg> bofh^28: the zh reading of 東方 always reminds me of 东风
<bofh^28> https://savannah.gnu.org/bugs/index.php?40755 let's play GSL Bessel function bug whack-a-mole.
<egg> bofh^28: "(i.e. every sane one)" the Digital Equipment Corporation would like a word with you,
<egg> bofh^28: also, International Business Machines,
<egg> (DEC floats best floats)
<egg> bofh^28: this page is fun
<egg> bofh^28: also let's not play that and play double-double instead,
<Qboid> [#1955] title: Still, Too slow warp speed in MacOS | Principia Version: Descartes... | https://github.com/mockingbirdnest/Principia/issues/1955
<kmath> <Bodegacats_> https://t.co/2f8XhlOcRV
* egg meows at whitequark
* egg meows at bofh^28
<bofh^28> egg: DEC floats are basically just weird-endian IEEE754 floats
<bofh^28> 12:36:30 <@egg> bofh^28: also let's not play that and play double-double instead,
<bofh^28> yes I've since switched games to that,
<bofh^28> :p
<egg> bofh^28: goood
* egg pets bofh^28
<whitequark> so I made a MIPS assembler https://hastebin.com/hotiwobiju.py
<whitequark> 113 lines
<bofh^28> > no MSA support,
<bofh^28> :p
<whitequark> wtf is MSA
<bofh^28> (seriously tho I'm actually shocked it's that short. like, I totally believe that being used on punchcards)
<bofh^28> MIPS SSE2
<bofh^28> about as pleasant to use as SSE2, for that matter.
<bofh^28> (namely, not at all).
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<egg> bofh^28: what, do you want to write whitequark's python on punchcards
<egg> bofh^28: what kind of punchcard, and with which encoding though,
<kmath> <✔planet4589> My leading theory is that Chandra decided that if Hubble could have a little vacation, it wanted one too.
<kmath> <Astro_Wright> On that note, what are some of the oldest, most out-of-field, or otherwise favorite citations you have used in a refereed paper?
<bofh^28> every single goddamn time: "I know, I'll take the 4" *10 seconds later as everyone is trying to sardine themselves into the cars* "You know, I should've just walked..."
<bofh^28> relatedly, there's an unusually large preponderance of Columbidae over at Saint-Sulpice cathedral.
<bofh^28> (okay it's actually not that bad, it being Sunday afternoon & catching it from Châtelet where the train does half-empty mercifully both helped a lot. but holy fuck the 4 is basically permanently over capacity).
<egg> bofh^28: :-p
<egg> !wpn bofh^28
* Qboid gives bofh^28 a soldering page table
* egg meows at bofh^28
<egg> bofh^28: 1. raspberries are feminine 2. à la framboise, "avec la" sounds like it's served next to The Great Cosmic Raspbery https://twitter.com/bofh453/status/1051490035617460226
<kmath> <bofh453> Just referred to some random brand of génoise avec le framboise as "the numerically unstable cookies", to much confusion.
<egg> bofh^28: also, wat
<UmbralRaptop> ;8ball Do columbidae contain columbium?
<kmath> UmbralRaptop: It is decidedly so
<egg> ;8ball did bofh^28 fly into a lamp
<kmath> egg: Outlook good
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<bofh^28> egg: so re: 1. oops. re: 2. unintentional but arguably I think that's a feature of the sentence
<bofh^28> re: wat: so these are the numerically stable cookies: http://images.sweetauthoring.com/product/66563.jpg
<bofh^28> clearly the knockoff is doing something silly like unpivoted Gaussian Elimination to construct said cookies,
<egg> bofh^28: yes, PiM's, why are they numerically stable
* egg pokes bofh^28
<egg> !wpn
* Qboid gives egg a Lippmann theorem-like page table
<egg> !wpn bofh^28 latency
* Qboid gives bofh^28 latency a raw cone
<bofh^28> egg: b/c I was doing numerical linalg the same day as I first saw them and the company name was, erm, familiar :p
<egg> bofh^28: ah
<bofh^28> (I think we were in like Gare de l'Est or somesuch?)
<egg> bofh^28: probably in ANBO
<egg> I think we ate a packet of those
<egg> bofh^28: but they make lots biscuits other than PiM's, so I was looking for numerical methods called "PiM's" and getting confused :-p
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<egg> bofh^28: so with polynomial sigmoids on the potential, if the constraint is that the force under the effect of the sigmoid is no greater than the true force, you can get a C0 force with л := sigmoid stretch / unscreened stretch = 6, a C1 force with л = 30, and the train stops here
<egg> smoother forces don't satisfy that constraint :-p
* egg double bofh^28
<egg> bofh^28: wait, actually I'm not sure that's even correct
<egg> yeah it's bullshit, I should look at the geometric mean of the sigmoid interval and not the arithmetic mean
<egg> yeah, the force under the sigmoid is always bigger than the unscreened one somewhere
<egg> !u U+200c
<Qboid> U+200C ZERO WIDTH NON-JOINER (‌)
<egg> whitequark: hmm
<bofh^28> yes that won't work at all, gah. this situation is not at all nice sadly.
<egg> bofh^28: so I guess the best I can look for is that the first k derivatives of the force have constant sign
<egg> (won't work with erf afaict, but fuck C∞
<bofh^28> like, if we work with erfc, erfc is *basically* zero for |x|>6 anyway, and erf is just 2-erfc iirc
<egg> bofh^28: yeah but it makes the force nasty
<egg> polynomials are good
<egg> bofh^28: also double
<egg> !wpn whitequark and котеньке
* Qboid gives whitequark and котеньке a copy-on-write semigroup
<egg> bofh^28: so I'll be going to ANBO on the 20th
<bofh^28> when is the shitpumpworks happening?
<bofh^28> the 20th & 21st are apparently an anime con in Paris so I will prolly head out the 22nd at the earliest if I am allowed to: https://www.parismanga.fr/882-billetterie/article.html
<egg> bofh^28: shitpumpworks are on the 22nd
<egg> bofh^28: okay, so I conjecture that all derivatives of the force have the right sign with the 3rd degree sigmoid if the sigmoid extends for twice as long as the unmodified force does
<egg> at least if the force is of degree 2
<egg> not sure what happens for higher-degree forces....
<egg> should be fine too
<egg> (actually proving that conjecture seems annoying)
<kmath> <✔Alex_Parker> I can haz zero g? https://t.co/wfWRxoS6S0
<Qboid> [#1955] title: Still, Too slow warp speed in MacOS | Principia Version: Descartes... | https://github.com/mockingbirdnest/Principia/issues/1955
<egg> cursed_mutex
<bofh^28> 18:36:18 <@egg> (actually proving that conjecture seems annoying)
<bofh^28> it just seems tedious tbh :p
<egg> bofh^28: afaict higher degree sigmoids (with more continuous derivatives of the force) have to be longer in order for all derivatives to have constant sign
* egg pokes bofh^28 with a !wpn
<egg> !wpn
* Qboid gives egg a revolving ticket
<egg> that works
<bofh^28> !wpn egg
* Qboid gives egg a Zener lobster
* egg eats the lobster
<bofh^28> wait, constant *sign*?
<egg> yes
<egg> so that the force under the sigmoid isn't bumpy or otherwise kinky
<UmbralRaptop> Cat names!
<egg> um
<egg> whitequark: is катод a cat name,
* egg meows at bofh^28
<bofh^28> oh, okay I see.
<bofh^28> also it's just, like, Anode/Cathode lol
* UmbralRaptop meows at cations
<egg|cell|egg> Bofh: I know
* egg|cell|egg meows at bofh with a chat
<B787_300> wait why is Bofh getting so many powers?
<UmbralRaptop> Witchcraft
<B787_300> also is it bof(h^28) or (bofh)^28?
<UmbralRaptop> good question
<egg|cell|egg> B787_300: the latter I think
<egg> !pet whitequark
* Qboid pets whitequark
<egg> !meow whitequark
* Qboid meows at whitequark
<egg> whitequark: from #principia: smolTCM
<egg> TCM?
<Qboid> egg: [TCM] => Trajectory Correction Manœuvre
<kmath> <QuietPineTrees> There are 21 million cubic feet of molten rock and metal directly below every square foot of Earth. ⏎ There is litera… https://t.co/p1EKLOYIUa
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<egg> !wpn bofh^28
* Qboid gives bofh^28 an unionized cthonic rake
<Majiir> !wpn egg
* Qboid gives egg a revolving UmbralRaptor
<Majiir> :OOOOO
<icefire> !wpn
* Qboid gives icefire a Ляпунов dip pen
<egg> !wpn Majiir
* Qboid gives Majiir a helium heisenbug which strongly resembles a Snark
<Majiir> egg, have you played with Rust at all?
<egg> not much
<egg> got involved in standardization though, on the infamous non-ASCII identifiers RFC
<Majiir> Noice
<Majiir> What are you up to these days?
<kmath> <eggleroy> Gérard Petit and Brian Luzum, eds. (2010), “Transformation between the International Terrestrial Reference System a… https://t.co/fRxg9ZBy7E
<Majiir> That's quite a large cat tax