The conversation that led to the creation of the channel:
<ferram4|afk> So, I continue following references on supersonic wing stuff,
and I find a paper that tries to tweak linear supersonic flow to work for
high AoA, hypersonic flight.
<KinglyRedLion> the FUCK
<ferram4|afk> I love technical papers. ^_^
<KinglyRedLion> Why would you do high AOA hypersonic?
<egg|zzz|egg> KinglyRedLion: to publish
Random bot things:
<UmbralRaptor> .mangle How to mangle an egg
<Kountdown> UmbralRaptor: Chop the egg
<@egg|zzz|egg> >wpn GreeningGalaxy
<@egg|zzz|egg> e_14159: you should make a RNN-based bot
<@egg|zzz|egg> @seen stabbity
<+Soozee> stabbity has changed nick to umbralraptor.umbralraptor is in #kspacademia, #principia and #bottorture..
<@egg|zzz|egg> O_o
<@egg|zzz|egg> !seen stabbity
<+Qboid> egg|zzz|egg: I haven't seen the user stabbity yet.
<@egg|zzz|egg> !seen UmbralRaptor
<+Qboid> egg|zzz|egg: I last saw UmbralRaptor on [01.06.2016 04:15:11] in #kspunofficial saying: "^Ascent guidance requested."
<@e_14159> egg|zzz|egg: For what?
<@egg|zzz|egg> e_14159: hmm
<@egg|zzz|egg> e_14159: generating weapons? or maybe trying to look like a normal kspacademia user?
<@egg|zzz|egg> e_14159: I'm pretty sure we don't pass the Turing test here, so maybe you can make an RNN to simulate us :-p
<@SnoopJeDi> I missed you Kountdown
<+Kountdown> Dont get me started on a shoestring budget...
<@UmbralRaptor> Kountdown confirmed to be an academic.
<@egg|zzz|egg> !wpn bofh
*Qboid gives bofh a completely harmless hug
<@bofh> :D
<@egg> !wpn bofh
*Qboid gives bofh an allotropic pike which strongly resembles a glaive
<@egg|unit_tests|egg> Qboid used to put that [weapon and adjective combinations] in a signed 32-bit integer, which we promptly overflowed
<UmbralRaptor> !wpn ferram4
* Qboid gives ferram4 an engineer
<ferram4> Ah, yes.
<ferram4> I shall beat my problems to death with an engineer.
* ferram4 facesmashes nearest problem
<@Thomas> >>(+ 1 1)
<Parenthesie> ;; EVAL-TIMEOUT
Quit: Parenthesie [Remote host closed the connection]
<@UmbralRaptor> !slap Qboid
* Qboid forks the source code of Qboid, replaces all semicolons with greek question marks and submits a pull request
-!- egg|anbo|egg [~egganbo|e@arouen-652-1-378-42.w90-17.abo.wanadoo.fr] has joined #kspacademia
< egg|anbo|egg> meow
<@raptop> !wpn egg|anbo|egg
* galois gives egg|anbo|egg a proper recursive ネコバス
<@raptop> Ah, meowing summons the catbus
<+SnoopJ> meowtropolitan transit
< egg|anbo|egg_> <mofh> the kitty knows it is soft at all times
< egg|anbo|egg_> !wpn the cat
* galois gives the cat a hydrazine
< egg|anbo|egg_> !wpn whitequark’s cats
* galois gives whitequark’s cats a cat-in-the-middle gaseous sabre
< re_irc> <@whitequark:matrix.org> !wpn egg
< queqiao-_> ⟨whitequark⟩ !wpn egg
* galois gives egg an autoclaved sparrow
< queqiao-_> ⟨whitequark⟩ ouch
< queqiao-_> ⟨whitequark⟩ that's Not Good
< queqiao-_> ⟨egg|matrix|egg⟩ yeah that sounds overcooked
<@raptop> !wpn
* galois gives raptop a hydrogen sunlight
<@raptop> ...a star?
* raptop belatedly schedules a booster shot
<@raptop> !8 Should COVID policy be run by Jebediah "MOAR BOOSTERS" Kerman?
<+galois> raptop: yes
<+SnoopJ> !wpn raptop, whitequark, egg|matrix|egg et al.
* galois gives raptop, whitequark, egg|matrix|egg et al. a cutting Rutherford tablet
<+SnoopJ> complaining about delivery of sub-standard gold foil?
Maths:
<egg> the flashlight is tamper-proof, courtesy of the department of mathematics
<egg> the only thing there is to life is triangles
<egg> the sting of death is a trigonometric line
<@egg> .
<@egg> .
<@egg> ..
<@egg> ...
<@egg> .....
<@egg> ........
<@soundnfury> crikey, those .s are breeding like rabbits!
<@egg|unit_tests|egg> oh but the affine ordered hofel is called a "masure"
<@egg|unit_tests|egg> that's a french word for, hovel basically
<@egg|unit_tests|egg> sometimes they run out of words and they use french
<@soundnfury> rqou: reading maths (or "majoring in math", as you call it) is definitely the best thing
<@soundnfury> if you can survive a maths degree without going insane, you can excel in any other career
<@soundnfury> and if you _do_ go insane, you can become a mathematician! ;)
<awang> egg|anbo|egg: Where's the "Leapfrog" part come from?
<@egg|anbo|egg> awang: trying to describe the fact that your velocities and positions are offset half a step from eachother, so advancing one leaps it over the other
<@egg|anbo|egg> (afaict nobody called Leapfrog invented it)
<@egg|anbo|egg> (but then a lot of people invented it, so you never know)
<@UmbralRaptor> xShadowx: triangles are an important part of life.
...
<@egg> xShadowx: UmbralRaptor has not quite embraced the triangles yet.
<@SnoopJeDi> hmm...from my brief reading of Schneier, since math is incompressible, I guess that's a decent hint that it might be encrypted. But then, I already knew that.
<@bofh> I mean, I feel like we all knew that. :P
<@bofh> The Monster, Unfortunately, Can Be Shown To Exist,
<egg|zz|egg> but I guess that's a consequence of having been raised with Ada
<@egg> you should take a course on differential geometry. that's the only sane way to approach SO(3)/SU(2).
<@bofh453> I mean yes, but also down that path lies madness universally.
<@egg> yes, but you'll be able to approch the madness soundly and free from coordinates.
<@egg> I like that I was recommended an algebra book to learn german and that I learned the word unmittelbar there :-p
<@egg> it means, of course, "by spending half an hour staring blankly at the page"
<@egg> very german, such concision
<egg|anbo|egg_> s8143504: I regret to inform you that 1/2, 3/2, and 5/2 are not integers
<@X> What is the point of living if you can't be confused from random ovals
Doing a Science:
<UmbralRaptor> If it's not on arXiv, it doesn't really exist.
<@egg> when you stare into the literature, the literature publishes back at you
<@egg|zzz|egg> cite all the things! [including personal communications on this channel]
<@UmbralRaptor> http://survivingtheworld.net/Lesson2797.html
<@e_14159> UmbralRaptor: Problem 2 is not solvable; uses imperial units.
*egg burns JPL at the stake of reproducibility
*egg also burns an empty control stake
<@egg|zzz|egg> If we are more abstruse it is by standing on the shoulders of really old giants
<@ferram4> "Conifer"?
<@ferram4> Why are we talking about trees?
<@ferram4> egg?
<@egg> ferram4: just because I needed to give a name to something
<@egg> ferram4: and "coning" was starting to sound too silly, so I went with an actual cone-related word
<@egg> ferram4: happens often in math that you pick random words and give them a meaning
<@ferram4> ...this is why no one can understand mathematicians.
<@UmbralRaptor> Document well, for tomorrow you may get mauled by a ネコバス.
* egg documents a well.
<@egg|zzz|egg> UmbralRaptor: abide the IAU resolution
<@egg|zzz|egg> or the wrath of the egg shall be upon you
* egg|figures|egg is tired
* egg|figures|egg still has figures to make
<@egg|figures|egg> hmm
<@egg|figures|egg> eh, I'd need to install the clean bedsheets in order to goto zzz anyway; might as well keep making figures
<@egg|figures|egg> UmbralRaptor: clearly this reasoning is sustainable and not the way to insanity ^
<@soundnfury> I yield to your clearly greater knowledge of high energy pophysics, with its two arΧiv categories "hep-th" (theology) and "hep-ex" (excommunication)
* egg|zzz|egg may have replaced a few words from a snarxiv title
<@egg> thank you Qboid for this detailed bibliography of madness
<@soundnfury> does the integral have a surprise π?
<@soundnfury> (or possibly an entirely unsurprising π)
* UmbralRaptor pokes ♂ with a stick.
< egg> UmbralRaptor: what is it doing?
<@UmbralRaptor> Lab subject
< egg> UmbralRaptor: why did you put that planet in a lab
< egg> also how
<@egg|zzz|egg> zzz
<@UmbralRaptor> ;kmath is egg zzzing?
<@kmath_> UmbralRaptor: It is certain
< egg|phone|egg> Moo?
<@UmbralRaptor> Hah
<@UmbralRaptor> <egg|zzz|egg> ≈ 0
< GreeningGalaxy> !u ≈
<+Qboid> U+2248 ALMOST EQUAL TO (≈)
<@SnoopJeDi> TIL egg is his own conjugate
< GreeningGalaxy> no wait, how have I never seen this before
< GreeningGalaxy> |egg> is a state. zzz is an operator.
< GreeningGalaxy> <egg|zzz|egg> is the expectation value of the measurement zzz on |egg>
<@SnoopJeDi> me too
<@UmbralRaptor> Gah. A bunch of radiation is leaking into my office. (Yes, it's from a nuclear reactor)
<@Ellied> I still get about five orders of magnitude of reasonable stability before it gets eaten by a cosmic toad.
<@egg> whitequark: have you eaten more moths
<@whitequark> egg: yes
<@whitequark> small ones
<egg> whitequark: has котя understood gearboxes
<@whitequark> egg: dunno
<@whitequark> not sure how to check
<@whitequark> also we definitely should give the cat more stimulants
<@bof> never underestimate the bandwidth of a kodachrome cylinder accelerating towards earth at ~9.81 m/s^2
<@Ellied> predictably, it was Laplace transforms that killed me
<Ellied> problem: string of words that almost makes sense. solution: append 'diode'
<@UmbralRaptor> …I think my Classical Mechanics prof is messing with us.
<@UmbralRaptor> He went over "all of Newtonian mechanics" in about an hour.
<@egg|zzz|egg> UmbralRaptor: well, that should fit :-p
<@UmbralRaptor> egg: next up: Euler-Lagrange Equations!
<@egg|zzz|egg> UmbralRaptor: but like, why waste an hour on the Newtonian formulation
<@egg|zzz|egg> UmbralRaptor: just explain Hamiltonian mechanics and be done with it :-p
<@bofh> UmbralRaptor: no going over Newtonian in an hour & then ignoring it is the correct thing to do :P
<@Iskierka> … wait how can a chemical be 4 flammability and an oxidizer?
<@bofh> organic peroxides are fun like that
<@bofh> they combine fuel *and* oxidizer into one convenient unstable molecule
<@Iskierka> So it's basically a warning "it's highly flammable and you can't stop it"
<@bofh> yep have fun!
<@bofh> (also I am able to successfully lock my laptop screen before going to a sink that one time I rubbed my eyes immediately after cutting up & trying one)
<@bofh> (priorities)
<@SnoopJeDi> oh good lord ghost pepper in eye RIP
<@bofh> I think I mostly just ran water on my eye for like 10 minutes while swearing incessantly
<@Iskierka> miiiiilk
<@bofh> it was not fun. would not ever recommend.
<@bofh> in your *eye*? I don't think so.
<@bofh> My E&M was Griffiths for intro, then Jackson for... the Jacksoning.
<@SnoopJeDI> Going to the library to get a monolith by Petr Beckmann on the subject ("The scattering of electromagnetic waves from rough surfaces", IIRC) was how I discovered his (far more interesting) "A History of Pi"
<@SnoopJeDI> err, monograph
* Ellied imagines snoopJedi carrying home a monolith from the library
<@SnoopJeDI> I miss that library
<@whitequark> I'm actually yet to see any cat drug that's not just a human drug in a liquid form in a small dosage
<egg> (are we just cats)
<@whitequark> anyway y'all significantly overstant how functional i am
<UmbralRaptor> Are you more object oriented?
<@whitequark> yes. i orient myself in direction of some object and lie there motionlessly. that's me
[After a discussion with fancy unicode notation]
* UmbralRaptor thinks egg|zzz|egg or bofh should write several tofu characters in a row on a blackboard to confuse students.
<@Ellied> oh good it's just general relativity, I thought I was about to see a paper about timekeeping standards.
<@egg> UmbralRaptor: bofh: today in things that are (even more) broken for multilingual speakers: autocowreck
<@egg> phl was typing french, when suddenly, Sportpuddingzeit
<@soundnfury> egg: I don't know what that's _meant_ to say, but Sportpuddingzeit sounds reasonable to me
<@egg> it was supposed to say "d'ordinateur"
<@egg> so no, Sportpuddingzeit is not really substituable
<@bofh> ROFL WTF DOES "SPORTPUDDINGZEIT" MEAN? Like I know it literally translates as "sports pudding time", but...
<@egg> bofh: it has no results on Google (and soon it will have the Thomas-whitequark logs for this conversation)
<@egg> bofh: okay so what's happening is *somehow* it decided that this was looking like german (in the middle of a french sentence), and then the german input method allows you to concatenate words at will without lifting the finger (this part is WAI really)
< egg|mobile|egg> Sportpuddingzeitministerkartoffel
<@egg> ^ example
<@bofh> Seems reasonable, by German standards.
* UmbralRaptor sends a school related email at 2345 on a friday >_<
<bofh> not sure what's weird about that at all
<FluffyFoxeh> yeah that sounds reasonable to me
<@SnoopJedi> bit early to be emailing, innit?
<@Ellied> my friends and I are putting together a conspiracy theory that getting a Ph.D. in physics absolves you of the need to eat and/or sleep.
<@bofh> brb pubmed
<egg> something something Henergy(qositions, pomenta)
...
<egg> because the Henergy depends on the qositions and the pomenta
<UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather.
<zlaing> https://mobile.twitter.com/Newpa_Hasai/status/960573677241864192 so can we please make it a thing in stories to have people summon/banish demons based on science textbook illustrations?
<bofh_> I mean, this sounds like an excellent story idea tbh.
<bofh_> (and I'd want to meet the sort of demon that can be summoned via physics textbook diagram, they seem like a cool entity)
<zlaing> (plot twist: it's a sphinx that makes you do jackson e&m problems :P)
<@UmbralRaptor> Either that's not a cat, or we're talking about the meowing kind.
<egg> to quote e_14159 quoting some prof, compsci doesn't need computers and isn't science
<@e_14159> Ellied: What's the LD50 of orally administered GRE?
<APlayer> 1
<@Ellied> e_14159: approximately 0.02 GRE per kilogram I think
<@e_14159> Ellied: So there's a 50% chance of a bad outcome, and a 50% chance of you dying during the test?
* e_14159 considers a PhD a bad outcome.
<@Ellied> I'm only applying to a master's program
<@Ellied> So yes
*SnoopJeDi returns to existential panic
<@e_14159> You mispelled academia.
<@SnoopJeDi> what's the difference
<@e_14159> One is normal and socially accepted.
<@SnoopJedi> also fair
<@bof> Which?
<APlayer> Huh... They keep finding more and more obfuscations: https://arxiv.org/pdf/1804.04014.pdf
<@SnoopJeDi> academia is a process of obfuscation innovation
<@bofh> I mean, you're not wrong.
<@SnoopJeDi> I *am* jaded, though :P
*UmbralRaptor stabs things.
*UmbralRaptor wonders if it would be easierto get vsini for GJ 15B by taking a spectrum himself.
<@UmbralRaptor> THERE IS NOTHING IN THE LITERATURE!
<@egg> UmbralRaptor: be the spectrum you want to see in the literature?
<@UmbralRaptop> All hail xxx.lanl.gov
<@whitequark> I bet someone's school proxy blocks that
<awang> brb, food
<awang> sorry :(
<rqou> actually bofh what is your background actually?
<rqou> you seem to do chem, astronomy, and numerics?
<@whitequark> and solid-state physics
<@whitequark> and pharmacology
<rqou> how do you end up with such an unusual combination?
<@whitequark> be ADHD, do science
<rqou> lol
<@whitequark> 100% serious
<@egg> bofh: UmbralRaptop: that paper on the anture of the TRAPPIST-1 eggsoplanets has impressively bad notation
<@egg> bofh: UmbralRaptop: there's a b0 that they define to y1 and mention nowhere else
<@egg> there's just a line that says b_0 = y_1.
<@egg> there should be a linter for unused definitions in papers >_>
<@UmbralRaptop> There really should.
<@bofh> how long until you run into something where the only spec is some ancient Fortran?
<@egg|zzz|egg> bofh: so, um, have you met the IERS conventions
<egg|work|egg> bofh: UmbralRaptop: oooh you can get the EOP series in XML, rather than just FORTRAN FORMAT
<bofh> egg|work|egg: I'm genuinely not sure which of those two datafile formats I'd prefer to work with.
<bofh> And that says a lot.
<@egg|zzz|egg> bofh: no, I'm just amazed at the ~modernity~
<@egg|zzz|egg> bofh: they also have csv fwiw
<bofh> egg|zzz|egg: point, XML is actually unusual as heck for scientific formats.
<@egg|zzz|egg> bofh: also I'm unsure about xml, but I'll probably take FORTRAN FORMAT over csv, csv is hell
<bofh> egg|zzz|egg: same
<bofh> egg|zzz|egg: CSV sounds simple at first and then you get something even slightly complex in it and OH GODS DO NOT WANT
<@UmbralRaptop> Obviously the solution to the CSV problems is to use FITS tables.
<bofh> AAAAAAAAAAAAAAAA
<bofh> down that path lies madness.
<@egg|zzz|egg> ah, yes, the best format,
<bofh> [[Citation Extremely Needed]]
<@bofh> tonight's a "dissolving caffeine pills in my coffee" kinda night.
<@egg|zzz|egg> boefh: (much like the Henergy is a function of qosition and pomentum, in this case it is the sum of the Tinetic and Votential parts,)
<@UmbralRaptop> Frequentist statistics: "we assumed $well_known_distribution and calculated x parameters and a p-value of y on our data."
<@UmbralRaptop> Bayesian statistics: "we performed computational dæmonology with the help of a supercomputer, and got an information factor of z. Also we found a bunch of (hyper)parameters that you've never heard of before."
<@oeuf> bofh: have you found a CH adapter, or a hotel room
<@bofh> I should get one, my battery is running low, and right, I knew I was forgetting something.
...
(various discussions of recent adventures around ETHZ)
...
<@oeuf> bofh: universities do not count as hotel rooms
...
<egg|work|egg> okay it was a mistake to show you where the ETHZ was :-p
<@raptop> egg|laptop|egg: what does the ANBOcat think of Foster's time series analysis paper?
<egg|laptop|egg> dunno, but its head has high proper motion
<@SnoopJeDi> I'm gonna guess "喵"
<@eggleroy> bofh: you'll love our constexpr UT1 literals
<@bofh453> how many years does it take to compile that?
<egg> in which reference frame?
<bofh> atomic time in the rest frame of a Cs-133 clock :P
<egg> but where is the clock
* egg waves a black hole around when compiling
<UmbralRaptop> oh https://twitter.com/bsgaudi/status/1263981022640852994
<kmath> <bsgaudi> ps. I've been told that we shouldn't use acronyms. It's the Roman Space Telescope or just Roman for short. You know, kinda like Madonna.
<egg|laptop|egg> UmbralRaptop: telling astronomers to not use acronyms is definitely going to work,
<WeylandsWings> egg telling anyone in the space business to not use acronyms isnt going to work
<raptop> amusing find: a lot of the literature uses kilojanskys, but doesn't label them as such
<raptop> ...I swear, I just found an error in a table in a 22 year old paper
<whitequark> how many people read an average paper, again?
<raptop> Fun fact: it has errata for a different part of the paper
<raptop> ...ADS claims that this paper was cited 1131 times
<whitequark> ok my question stands
<raptop> (please enjoy the FORTRAN 77 code included in the paper)
<egg|laptop|egg> https://twitter.com/whitequark/status/1311602475934322688 how does one spin a cat
<kmath> <whitequark> @databasescaling yeah i spun the cat a few times
<egg|laptop|egg> tired: Schrödinger’s cat; wired: Stern-Gerlach cat
<whitequark> egg|laptop|egg: uh... around the vertical axis?
<whitequark> the cat did not continue spinning, so i determined i'm not dreaming
<egg|anbo|egg> tfw the image format has better dynamic range than the people viewing the image
<egg|anbo|egg> raptop: asking mofh about ANBOcat: « have you seen the professor ? »
<egg|anbo|egg> (conteggst is we had come to the inescapable conclusion that ANBOcat is the PI here)
<@raptop> Congratulations to ANBOcat on recieving tenure!
< egg|anbo|egg> raptop: speaking of akkadian i have a shiny new twitter bio
<@raptop> nice
< egg|anbo|egg> in the process I learned that akkadian does the thing where it uses the writing medium to literary, scientific, scholarly compositions, like « paper » in English
< egg|anbo|egg> (but obviously there it’s « tablet »)
< egg|anbo|egg> I think a more literal translation of the akkadian line would be « an egg submerged in the sea of tablets »
< egg|anbo|egg> though now that I think of it I am not sure ša 𒊭 is an appropriate way to connect the tablets and the sea here
< egg|anbo|egg> further research shows it is fine actually
< egg|anbo|egg> the further research consisted in the egg becoming submerged even more in the sea of tablets
<@SnoopJ> this is the nature of things
<@raptop> today in paper writing disputes: a coauthor suggests that I use AU rather than au
< egg|anbo|egg> raptop: please drown the coauthor in IAU resolutions (in both languages)
< egg|anbo|egg> raptop: merci de noyer le coauteur dans des résolutions de l’UAI (dans les deux langues)
* egg|laptop|egg has clay
* egg|laptop|egg can now write
<@raptop> Deorbiting moons is weird because you're deep in the linear regime
Dwarf Fortress is entirely too realistic:
<@egg|zzz|egg> e_14159: what with vomiting etc.
<@egg|zzz|egg> e_14159: academics don't like being exposed to the light
<@egg|zzz|egg> they write a lot
<@e_14159> Does your fortress do anything other than writing papers?
<@egg|zzz|egg> e_14159: it waits for goblins to go away
<@egg|zzz|egg> e_14159: seriously, I've even stopped smelting gold (I want moar tables and chairs in the library eventually) because I'm saving wood for critical tasks
<@egg|zzz|egg> UmbralRaptor: why is one of my goblin scholars permanently worried D:
<@egg|zzz|egg> UmbralRaptor: hm, my worried goblin is saying "In life, you should work hard. Then work harder."
---
<@egg|zzz|egg> UmbralRaptor: "I've been discussing aqua regia. It makes me very anxious."
---
<@egg|zzz|egg> e_14159: I have this worried goblin scholar, researching makes her anxious, and she kept staying in the library, sleeping there, just researching all the time, sleeping on the floor instead of in her room, thus never getting a positive thought from anything
---
<@egg|zzz|egg> UmbralRaptor: well, I assigned the second meeting hall (the one that will become the starwatch of oxen dining room) personally to her, for now she's doing research there instead of looking at her fine marble tables
---
<@egg|zzz|egg> UmbralRaptor: so, the worried goblin drank too much, so now she feels euphoric due to inebriation, and she feels gratitude towards someone who rescued her
<@egg|zzz|egg> UmbralRaptor: df social issues are soluble in ethanol
---
<@egg|zzz|egg> UmbralRaptor: the worried goblin strikes again: "she felt restless after being able to rest and recuperate"
---
<@egg> UmbralRaptor: fwiw, worried goblin scholar Nomal is a novice mechanical and optical engineer, and dabbles in all sorts of academic disciplines
<egg|zzz|egg> sooo, how's Nomal doing
<egg|zzz|egg> anxious after discussing foraging behaviour, anxious after discussing the retort, axious afte discussing bodily fluids
<whitequark> bodilyfluids
<egg|zzz|egg> blissfull after sleeping in a bedroom like a personal palace, anxious after discussing reproductive behaviour, anxious after discussing existence
* whitequark wonders if Nomal is just bofh
<egg|zzz|egg> interested after learing about the collection of maps and other information into a single text, in The Knowledge of the Atlas
<egg|zzz|egg> anxious after discussing the lever, anxious after discussing the colour of stars, anxious after discussing embriological development, anxious after discussing diagonals, anxious after discussing the water-powered sawmill
<soundnfury> interested after learning about the collection of sustainers and other boosters into a single stage, in The Knowledge of the SM-65D Atlas :P
<egg|zzz|egg> also anxious after discussing: diseases, art, pulmonary circulation, oil of vitriol
<egg|zzz|egg> interested after learning about the techniques of balancing and completion for solving new equation, in Completion: A New Approach
<egg|zzz|egg> s/Completion/Balancing and Completion
<Qboid> egg|zzz|egg meant to say: interested after learning about the techniques of balancing and Balancing and Completion for solving new equation, in Completion: A New Approach
<egg|zzz|egg> also interested after learning about the classification of muscles, in Do you know the muscles?
<egg|zzz|egg> and anxious about a good many more things whose enumeration I shall spare you
<egg|zzz|egg> there's a quire called "The Journey into Aqua Regia"
<egg|zzz|egg> uh
<egg|zzz|egg> btw, The Knowledge of the Atlas is by Atir Shieldskin
<egg|zzz|egg> can't find a publication date
<egg|zzz|egg> JovianRaptor: so I'm making a refuse stockpile in the dining room that accepts only beak dog skulls, to serve as a natural history museum of the beak dog
<Iskierka> beak dog? a platypus?
<egg|zzz|egg> no idea
<egg|zzz|egg> DF has beak dogs
<egg|zzz|egg> whitequark: http://dwarffortresswiki.org/index.php/DF2014:Beak_dog
<Iskierka> whitesquawk
<JovianRaptor> Iskierka: they're probably somewhere in the deinonychus to utahraptor range.
<egg|zzz|egg> Iskierka: oops, meant to type Iskierka not whitequark
<egg|zzz|egg> so most of my dwarves are visiting scholars or artists that then get naturalized
<egg|zzz|egg> but since they're from another civilization, the musicians know music that uses instruments I can't make
<egg|zzz|egg> so mostly they're simulating the instruments they want while the ones they have stay in chests >_>
<JovianRaptor> Numeric or analytic simulations?
<egg|zzz|egg> JovianRaptor: one of my scholars has become an astronomer!
<JovianRaptor> \o/
<egg|zzz|egg> they feel satisfied upon improving surgery O_o
<egg|zzz|egg> he is in doubt after discussing draining
<egg|zzz|egg> what is it the astronomers do here exactly
<JovianRaptor> Simulations
<@egg> UmbralRaptor: aaargh, I'm trying to mobilize my infantry but they're busy listening to poetry
<@egg|zzz|egg> UmbralRaptor: hmm, zzz, heggsafleggsagons, DF academics?
<@UmbralRaptor> DF Academics!
<@egg|zzz|egg> hmm
<@egg|zzz|egg> UmbralRaptor: hmm, do I still know how to play DF academia
<@egg|zzz|egg> UmbralRaptor: so, I'm under goblin siege, business as ususal
<@egg|zzz|egg> s/sal/al
<+Qboid> egg|zzz|egg meant to say: UmbralRaptor: so, I'm under goblin siege, business as usual
<@egg|zzz|egg> UmbralRaptor: ok, found nomal
<@egg|zzz|egg> UmbralRaptor: she's discussing individual happiness
<@egg|zzz|egg> UmbralRaptor: she felt anxious after discussing (bodily fluids|the colour of stars|triangulations|interpersonal ethics|aqua regia|triangles|foraging behaviour|time|social behaviour|embriological development)
<@egg|zzz|egg> yup, that's Nomal
<@UmbralRaptor> heh
<@egg|zzz|egg> UmbralRaptor: Nomal is reading "A humble offering to ampoules"
<@UmbralRaptor> … is she taking drugs?
<@egg|zzz|egg> ethanol, occasionally? I think there's something in the gist about that
<@egg|zzz|egg> UmbralRaptor: there's a book lying around on a marble table entitled "Inquiries on the Brightness of Stars"... have they invented magnitudes D:
<@UmbralRaptor> Quick! Invent Janskys!
<@UmbralRaptor> Before it's too late!
<@egg|zzz|egg> UmbralRaptor: Nomal is discussing triangulations
<@egg|zzz|egg> I wonder whether she's going to encounter the Catalan numbers
<@egg|zzz|egg> or flexagons!
<@egg|zzz|egg> UmbralRaptor: she's discussing triangulations with an elf
<@UmbralRaptor> triangular trees?
<@egg|zzz|egg> UmbralRaptor: O: "She is interested after learning about the construction and use of the ampoule. She is interested after reading A humble offering to ampoules. She is interested after learning A humble offering to ampoules."
<@egg|zzz|egg> not anxious for once!
<@egg|zzz|egg> UmbralRaptor: welp, she felt anxious after discussing triangulations
<@egg|zzz|egg> UmbralRaptor: the bards and a dancer are performing The Sun sets on Morsel, which is an example of The Silkiness of Lyrics
<@egg|zzz|egg> 5 musicians, but only 1 has an instrument, the other are simulating instruments >_>
<@egg|zzz|egg> and a poet reciting poetry
<@egg> !seen nomal
<+Qboid> egg: I haven't seen the user nomal yet.
<@UmbralRaptor> Qboid: check the library.
<@egg|zzz|egg> UmbralRaptor: choose Nomal|food
<@UmbralRaptor> egg|zzz|egg: This will result in choosing to study until one passes out!
<@egg|zzz|egg> UmbralRaptor: probably
<@egg|zzz|egg> DF time!
<@egg|zzz|egg> UmbralRaptor: nomal is socializing!
<@egg|zzz|egg> she was delighted & interested after watching a performance
<@UmbralRaptor> !
<@egg|zzz|egg> UmbralRaptor: she was also interested after learning about Exploration of Toxic Substances
<@egg|zzz|egg> UmbralRaptor: in DF, "Inquiries on the Anatomy of the Eye" raises questions as to its experimental methods
<@egg|zzz|egg> ... my soldiers go to battle with books, of course.
<@egg|zzz|egg> UmbralRaptor: dog: this animal is ready to be trained. cavy: this animal can't work. cat: this animal isn't interested in your wishes.
<@egg|zzz|egg> I wonder whether the larger cats have that property too :-p
<@egg|zzz|egg> UmbralRaptor: Nomal is assembling a trap!
<@egg|zzz|egg> ... to collect goblinite
*egg|zzz|egg wonders whether the trap involves aqua regia
<@egg|zzz|egg> UmbralRaptor: !!!! granting citizenship to Nomal
<@egg|zzz|egg> UmbralRaptor: she is relieved after petitioning for citizenship, and satisfied after being granted citizenship
<@egg|zzz|egg> UmbralRaptor: the goblin Domas Baroness Nogleshlimul of Ancientbird and Baroness Consort of Tradevale is one of the first of her kind too
<@egg|zzz|egg> and looks 346 years old, in a world that's 260 years old
<@egg|zzz|egg> Nomal feels anxious after discussing disease and fouled water, and blissful after sleeping in a room like a personal palace
<@Iskierka> I hope there's going to be a novella adventures of nomal
<@egg|zzz|egg> UmbralRaptor: nomal is somewhere in the amphitheatre
<@egg|zzz|egg> UmbralRaptor: she's discussing the water-powered sawmill; she has previously felt anxious after discussing diseases, art, pulmonary circulation, was dejected after a lack of meals and alcohol (not that there aren't any around, she just doesn't leave her research)
<UmbralRaptor> … one of the other grad students just compared me to nomal O_o
< egg|anbo|egg> running computations in Mathematica to approximate circles in Dwarf Fortress
< egg|anbo|egg> gotta make round lecture theatres
< egg|anbo|egg> The brewer felt satisfied after learning about the relationship between the lengths of the hypotenuse of a right triangle and the other two sides.
Numerical Analysis:
<@egg> ferram4: I guess contrary to principia where if the effect stays under step size reductions it's probably a thing, here you'd need a supersonic wind tunnel
<@egg> do you have one of those lying around
<@ferram4> No.
<@egg> ... fundraiser for FAR?
* SnoopJeDi fires up the oven
<@ferram4> While that wold be fun, I don't have a place to put it, and I don't think the police would think well of it. Considering it requires lots of high-pressure gas to run.
< egg|laptop|egg> you introduce the concept of local error
< egg|laptop|egg> and things get fun
< egg|laptop|egg> Majiir: btw, you may have heard the incantation "RK4", that's just a particular fixed-step one-step method (of the Runge-Kutta kind, and developped by Runge and Kutta), of fourth order. It's kind of meh, but common. back to the eggsplanation
< egg|laptop|egg> Majiir: but the *magically* above is well-understood
< egg|laptop|egg> and works well
<@SnoopJeDi> the short answer is that choosing integration step sizes is a very rich problem, and very much an area of ongoing research
< egg|laptop|egg> the long answer is "principia is a KSP mod whose bibliography fills a square in my library"
< egg|laptop|egg> SnoopJeDi: PDEs are evil
<@SnoopJeDi> I cannot dispute this statement
< egg|laptop|egg> Majiir: if your problem is a PDE, you will need to summon greater madness than mine
< egg|laptop|egg> Majiir: I suggest ferram4
< egg|laptop|egg> Majiir: formally, shittygameengine does x1 += v0 dt; v1 += force(x0, t0) dt
< egg|laptop|egg> and you might, naively
< egg|laptop|egg> but
< egg|laptop|egg> this is forward Euler
< egg|laptop|egg> if you learn one thing, it's that it's literally the shittiest correct thing you can do
<@ferram4> "correct"
< egg|laptop|egg> ok, the technical term is the shittiest *consistent* thing
<@ferram4> For very wide definitions of "correct"
< egg|laptop|egg> ferram4: consistent.
< egg|laptop|egg> SnoopJeDi: they're used interchangeably in various parts of the literature
<@SnoopJeDi> There are many ways to be wrong, egg|laptop|egg ;P
< egg|laptop|egg> SnoopJeDi: I will drown you in review articles
* egg|laptop|egg emerges from a sea of numerical integration papers
< egg|laptop|egg> if you're doing orbits, symplecticity is very attractive
< egg|laptop|egg> because the truth is pretty much a cute Hamiltonian that you can pet
<@SnoopJeDi> that thread gives me warm fuzzies
<@egg|zzz|egg> SnoopJedi: That's Atlas [the thread starter's cat]
* soundnfury gives egg a shampoo and ill-conditioner
<bofh> (now I kinda want to write an ill-conditioner that rearranges floating-point expressions into mathematically equivalent expressions that have the worst possible floating-point condition numbers)
<egg> all hail the floating point cat
<egg> a point cat is like a point mass? :-p
<@Iskierka> efficient models are inaccurate models
<@SnoopJedi> (I have no idea but just consider Fluid Dynamics to be literal actual sorcery)
<bofh> FD basically is sorcery, tbh.
<BPlayer> Is it just me, or are supersonic aerodynamics way more intuitive than sub- or transonic ones?
<egg|laptop|egg> bofh: okay, today's episode of "principia development": a bunchmark that, if run with profiling, causes the meachine to powercycle
<egg|laptop|egg> it's deterministic
<egg|laptop|egg> if you're iterating over more than 2^64 values you have a different problem than the type.
...
<@e_14159> If you have the choice between brute-forcing and anything else, choose anything else.
<@e_14159> (Terms and conditions apply)
...
<@soundnfury> like, even with just O(n!), there is basically no difference between a hyperoptimised assembly routine and a wheezing overweight man carrying rocks around in XKCD's desert.
<egg|laptop|egg> awang: sometimes we end up with some confusing identifiers in Principia
<egg|laptop|egg> "UnmanageableVesselVelocity"
<egg|laptop|egg> (that's the velocity of an unmaneagable vessel, not an unmanageable velocity)
<ferram4_> Every time you say "psychohistory" I imagine that Principia includes a room that every couple centuries or so a hologram of a long-dead eggrobin and pleroy show up to talk about the current crisis and how it was resolved.
<@egg> it's actually just a lecture in numerical analysis
<@rqou> i can still use scipy.integrate.ode
<@egg> rqou: yes, but you asked the egg so now you're going to hear about the numerics
<@egg> rqou: the wrath of the egg is upon you now :-p
<@e_14159> egg: s/wrath/numerics
<@egg> is there even a difference
<@egg|zzz|egg> bofh: now of course you much more likely to get a glitch in a chaotic system, and then you don't have a shadow.
<@UmbralRaptor> Not sure if you're talking about numeric integration or witchcraft.
<@egg|zzz|egg> what's the difference
<@egg|zzz|egg> ネコノミコン
<@egg> the compiler orients the Earth,
<@mofh> Plus I can convert good C++ into C or Fortran90 much more quickly than I can convert bad Fortran into good Fortran90.
<@egg> if you compute arccos by root finding on cos, even if your cos is good, you're not going to have a good time
<SilverFox> meme for yall: [r/shittyaskscience question: How high will I be expected to count for an advanced mathematics degree]
<mofh> SilverFox: serious answer from someone who did analysis, the numbers I worked with were {0, 1/2π, 1, "large constant", \aleph_0, c}. :P
<mofh> where c = 2^{\aleph_0}
<egg|laptop|egg> mofh: maybe 2 sometimes