UmbralRaptor 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> … one of the other grad students just compared me to nomal O_o | <ferram4> I shall beat my problems to death with an engineer.
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<bofh> egg|cell|egg: https://mobile.twitter.com/bofh453/status/897608533855928320 holy shit such an incredibly useful answer
<kmath> <bofh453> @stephentyrone Okay, this is possibly a *very* dumb question: under what input constraints can we say * (float64 mu… https://t.co/3oZteptCja
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<bofh> holy shit
<kmath> <stephentyrone> @bofh453 signs*. You can do this mechanically, but Dekker came up with a clever trick to do it using only arithmetic.
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<NonlocalRaptor> well, that's disappointing… https://arxiv.org/abs/1708.03486
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<whitequark> NonlocalRaptor: wait is that legit
<whitequark> or some sort of joke
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<Fiora> whitequark: probably a crank paper
<Fiora> well, not -crank- necessarily but probably at least... wrong
<Fiora> scott aaronson posted an update saying he's fairly dubious
<whitequark> right
<egg|cell|egg> !Wpn Fiora and whitequark
* Qboid gives Fiora and whitequark an infinite FORTH
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<egg|work|egg> !wpn bofh
* Qboid gives bofh a mean tangential pogonip
<egg|work|egg> !kd next
<Qboid> egg|work|egg: ID: 5 | Name: 「みちびき3号機」/H-IIAロケット35号機 | Time: 2017-08-16 01:00:00 | Unixtime: 1502845200 | Left: 0d 10h 20m 29s
<Qboid> egg|work|egg: Description: An H-IIA rocket will launch the DS-2000-based みちびき3号機 navigation spacecraft from 種子島宇宙センター (see http://space.skyrocket.de/doc_sdat/qzs-3.htm). https://youtu.be/-bgZYjnN9gQ
<kmath> YouTube - ※打ち上日再設定※ 準天頂衛星システム静止軌道衛星「みちびき3号機」/H-IIAロケット35号機打ち上げ中継
<egg|work|egg> yes but no, that one got scrubbed
<egg|work|egg> hm, now they pushed their livestream to the 19th
<egg|work|egg> !kd -edit:5 time 2017-08-19T04:30Z
<Qboid> egg|work|egg: You don't have the permission to use this command! Only ADMIN can use this command! You are NORMAL.
<egg|work|egg> ...
<egg|work|egg> !kd -edit:5 time 2017-08-19T04:30Z
<Qboid> egg|work|egg: You don't have the permission to use this command! Only ADMIN can use this command! You are NORMAL.
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<kmath> <toritruslow> hmm... yes, I believe I have just the volume you seek https://t.co/KdAsu2w4Yu
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<egg|work|egg> bofh: cat!
<Qboid> 2d 0h 0m 0s left to event #2: Atlas 5 • TDRS M [at 2017-08-18 14:04:00]. Say '!kountdown 2' for details
<egg|work|egg> !wpn bofh, Fiora
* Qboid gives bofh, Fiora a chlorinated cult
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<egg|phone|egg> !Wpn whitequark
* Qboid gives whitequark a router-like compression
<egg|phone|egg> !Wpn bofh
* Qboid gives bofh a tressym
<NonlocalRaptor> whitequark: no idea
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<NonlocalRaptor> … 2.2 M_☉?! https://goo.gl/photos/9zy5e5hJX9LfsW4d6
<NonlocalRaptor> yes, that's a LaTeX slide
<NonlocalRaptor> stats presentation
<egg|zzz|egg> !wpn NonlocalRaptor
* Qboid gives NonlocalRaptor a strontium mace which vaguely resembles an inequality
<NonlocalRaptor> !wpn egg|zzz|egg
* Qboid gives egg|zzz|egg a gregarious muffin
* egg|zzz|egg stares at a herd of muffins
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<kmath> <johnregehr> that groggy feeling when you nap too long https://t.co/3wrJesUw74
<bofh> !wpn eg
* Qboid gives eg an udev-named Kountdown/adjective hybrid
<bofh> !wpn egg
* Qboid gives egg a Müller commutator
<bofh> NonlocalRaptor: so like the association of LaTeX & math content is fairly natural IMO
<NonlocalRaptor> yeah
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<egg|zzz|egg> bofh: will try to take a screenshot of the Чебышёв egglipse with Чебышёв :D
<egg|zzz|egg> bofh: note that without Principia, RealSolarSystem has a very inaccurate moon, what with the moon having strong third-body effeggts
<bofh> Yeah, very very familiar with that, heh.
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<egg|zzz|egg> !wpn regex
* Qboid gives regex a volatile RF dip pen
<egg|zzz|egg> !wpn ferram4
* Qboid gives ferram4 a snowy dynamo
<kmath> <Hifumi__Togo> I love Twitter https://t.co/vD3t13F3Sv
<egg|zzz|egg> NonlocalRaptor: ^
<egg|zzz|egg> bofh: integrated from 1951
<bofh> Jesus, that's frighteningly accurate.
<egg|zzz|egg> !kd -edit:5 time 2017-08-19T04:30Z
<Qboid> egg|zzz|egg: Updated event #5: 「みちびき3号機」/H-IIAロケット35号機 - An H-IIA rocket will launch the DS-2000-based みちびき3号機 navigation spacecraft from 種子島宇宙センター (see http://space.skyrocket.de/doc_sdat/qzs-3.htm). https://youtu.be/-bgZYjnN9gQ - 2017-08-19 04:30:00
<kmath> YouTube - ※打ち上日再設定※ 準天頂衛星システム静止軌道衛星「みちびき3号機」/H-IIAロケット35号機打ち上げ中継
<egg|zzz|egg> !kd next
<Qboid> egg|zzz|egg: ID: 4 | Name: Благовест №11Л/Бриз-М/Протон-М | Time: 2017-08-16 22:00:00 | Unixtime: 1502920800 | Left: 0d 2h 48m 5s
<Qboid> egg|zzz|egg: Description: A Протон-М with Бриз-М upper stage will launch the Экспресс-2000-based Благовест №11Л communications satellite into GEO (see http://space.skyrocket.de/doc_sdat/blagovest-1.htm).
<ferram4> egg|zzz|egg, I think you managed to catch it just as it went over Nashville. And it looks like at the correct time. Congrats, now check the behavior of Venus + Mercury and see if they cause an apocalypse in the far future. :P
<regex> egg|zzz|egg, is the location over Earth correct?
<regex> I can't tell, clouds are crazy good looking
<regex> Holy shit, it is...
<bofh> yes, it is.
<bofh> goddamn.
<regex> That is incredible. Great work.
<bofh> ^
<egg|zzz|egg> ferram4: it is at the time of conjunction, which is the nominal time of the Чебышёв release :-p (we had determined that it was just off nashville at that time iirc)
<egg|zzz|egg> ferram4: btw, Cayley is the first version to have an update reminder, it triggers at that time
<egg|zzz|egg> ferram4: so if you're at the right place, playing KSP, you'll get a reminder popping up, and then the sun will go dark
<bofh> nice
<ferram4> egg|zzz|egg, It is a sign from our Lord Egg, "Update your fucking mods goddammit"
<NonlocalRaptor> egg|zzz|egg: nice!
<NonlocalRaptor> egg|zzz|egg: !win32
<egg|zzz|egg> ferram4: :D
<NonlocalRaptor> It explicitly chooses a non-mooing integrator. =\
<egg|zzz|egg> NonlocalRaptor: what do you mean eggsactly
<NonlocalRaptor> The author mentioned MERCURY6
<egg|zzz|egg> ah, EARTHMOO
<NonlocalRaptor> yeah
<egg|zzz|egg> bofh: so, when x~y, it seems from experiments that y/sqrt((x-y)(x+y)) has only 1 ULP? I had calculated 1.5, but I'm seeing 1
<egg|zzz|egg> s/experiments/eggsperiments/ of course
<egg|zzz|egg> bofh: also wow naively doing y/sqrt(x^2-y^2) is a Kahanrantworthy tyre fire
<egg|zzz|egg> (ah nevermind for the half ULP thing I was look at the wrong graph)
<egg|zzz|egg> bofh: so yeah, doing it right has relative errors up to 2^-51.5, doing it wrong has relative errors up to 2^-8.5 (in binary64) :D :D :D
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<egg|zzz|egg> !wpn NonlocalRaptor
* Qboid gives NonlocalRaptor a lithium subnormal interregnum
<kmath> <Sci_Phile> It's hard to stay positive sometimes, so here's a bird realizing a love of drumming https://t.co/DplQ4uZAPf
<NonlocalRaptor> !wpn egg
* Qboid gives egg a phased git
* soundnfury has just watched a 53-minute Lindybeige video
* soundnfury is so happy
<kmath> <AnalysisFact> Integral whose value is the nth Catalan number: https://t.co/CkSsKnBOnK
<kmath> <cbquist> Conference coffee breaks are better with hawks. #PRPD17 https://t.co/Zon9Oqg8ot
<egg|zzz|egg> bofh: hm, now is there a combinatorially satisfying argument for that
<bofh> that's what I'm wondering about
<soundnfury> egg|zzz|egg: I don't know, but after a quick perusal of what Alpha says about the integrand, the series expansion at x=inf looks suggestive
<soundnfury> x^n (i - Σ2iCn/x^(n+1))
<egg|zzz|egg> bofh: unrelated to anything, these QM videos are neat https://www.youtube.com/channel/UCFk__1iexL3T5gvGcMpeHNA
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<egg|zzz|egg> !wpn NonlocalRaptor
* Qboid gives NonlocalRaptor an osmium ORBAT
<egg|zzz|egg> bofh: how would you go about poking that eccentricity (or inclination) graph of retrobop with Fourier transforms
<egg|zzz|egg> I seem to be seeing high frequency (up to 8 days) effects pretty well, but the obvious equationoftimey look of it is very low frequency, and there things look like shit afaict
<egg|zzz|egg> hm maybe I'm misunderstanding the output of the discrete Fourier transform
<bofh> so first off the low-frequency bit of it strikes me as being possibly a secular resonance?
<bofh> but like, window the datapoints and then DFT/FFT them? no clue what window the astro folks use tho
<egg|zzz|egg> bofh: I'm not sure how a DFT actually works though
<egg|zzz|egg> so I might be doing something *really stupid*
<bofh> egg|zzz|egg: it decomposes a given function (or matrix) into a sum over its periodic components
<egg|zzz|egg> bofh: yes, I know what a Fourier transform does, but I'm confused by what the discrete thingy does; if I have a list with samples every hour for 5 a, what is the resulting list of complex numbers indexed by
<bofh> egg|zzz|egg: https://en.wikipedia.org/wiki/Discrete_Fourier_transform#Motivation the fourth point here I think is what you're after
<bofh> side note: I'm pretty convinced at this point that Paypal customer service's voice menu system is literally designed by Satan Himself.
<egg|zzz|egg> voice menu systems in general
<bofh> true
<egg|zzz|egg> so ν = k/(NT)?
<bofh> yes
<egg|zzz|egg> wait that can't be right, it would mean that the frequencies would range from 0 to about 1/T; ν = k/T perhaps, so that the frequencies range from once over the interval to every sample?
<bofh> errm, yes, no N. I'm daft.