raptop 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. | We can haz pdf
<egg|laptop|egg_> bofh: okay so assuming bront's method on the derivative working with quadruple the target precision targeting half the target precision on the rootfinding yields accurate maxima, here is the corrected table https://github.com/mockingbirdnest/Principia/pull/2032/files/67aa345183880b8e79c1a56fbd34c4232e8982ec..543ea5a3e5438318d284b5c5441cf7d9675fab51
<egg|laptop|egg_> so a bunch of cases of "NMaximize just picked the wrong maximum", and some cases where NMaximize didn't finish maximizing
<bofh> I'm kinda weirded out by the second of those.
<bofh> Wrong maximum is a semi-common failure mode but the latter is odd, esp. if you're dealing with things as nice and smooth as polynomials
<egg|laptop|egg_> bofh: yes
<egg|laptop|egg_> bofh: maybe i didn't set my options right and something was in machine precision instead of 100-something-sigdec precision, confusing things?
<bofh> yeah, that would certainly do it.
<egg|laptop|egg_> bofh: it's also infinitely faster to Bront those derivatives than to NMaximize on the same interval anyway
<egg|laptop|egg_> also i should remember to take some cat with paper pics
<egg|laptop|egg_> i even brought a lot of papers
<bofh> I should do the same, given I finally got the printer working
<UmbralRaptor> You can test to see if different cats prefer different papers.
<egg|laptop|egg_> UmbralRaptor: bofh: maybe train a cat to predict the outcome of peer review, write a paper about it, and see what the cat thinks,
<egg|laptop|egg_> bofh: meanwhile boats are boating by in the thick fog
<bofh> ~*~ Normandy ~*~
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<UmbralRaptor> Are the foghorns like moos?
<egg|laptop|egg_> https://twitter.com/Alex_Parker/status/1078168456380305408 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
<kmath> <✔Alex_Parker> "We are seeing an offset of 10 milliradians between the planned orbital insertion and our current trajectory." ⏎ ⏎ "Wa… https://t.co/xSxG79ExzJ
<egg|laptop|egg_> [insert principia madness here]
<UmbralRaptor> At least typical SF ships have oodles of ΔV.
<egg|laptop|egg_> UmbralRaptor: okay but with that comes different fun
<egg|laptop|egg_> UmbralRaptor: [insert 10-hour lectures about relativistic timescales and reference systems in fundamental astronomy]
<egg|laptop|egg_> or,
<egg|laptop|egg_> "are you using the TDB-compatible or the TT-compatible values"
<egg|laptop|egg_> (or TCG or TCB but these mistakes would yield obvious wrongness, TT vs. TDB is confusing)
<UmbralRaptor> egg|laptop|egg_: so, I saw a paper recently that radial velocities are getting to the point that we need better relativistic corrections.
<egg|laptop|egg_> aaaaaaaaaaaaaaaaaaaaaaaaaaa
<UmbralRaptor> Also, speaking of which, I'm taking a GR class this spring. :D
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<egg|laptop|egg_> UmbralRaptor: yay
* egg|laptop|egg_ pets UmbralRaptor relativistically
* egg|laptop|egg_ meows at bofh
* bofh pets egg|laptop|egg_
<egg|laptop|egg_> bofh: how are the papers and cats
<egg|laptop|egg_> UmbralRaptor Are the foghorns like moos? << they don't foghorn often fwiw
<egg|laptop|egg_> (good thing given how much traffic there is)
<bofh> man I've missed working with compchem
<egg|laptop|egg_> bofh: however have you considered: astronomy
<bofh> I think it's completely clouded over, sec.
<bofh> let me check meteo
<bofh> hrm, there seems to be a gap in them for an hour; I might hop on the roof.
<egg|laptop|egg_> bofh: no, i mean computational astronomy
<egg|laptop|egg_> bofh: not observation
<egg|laptop|egg_> bofh: you don't even have instruments in paris also the skies are crap
<bofh> I mean I don't have them in IL either :p
<egg|laptop|egg_> bofh: also optimizing the TRAPPIST-1 solution is hard,
<egg|laptop|egg_> (i think phl got to something lικε χ^2 = 50 000 today and will try a different approach)
* egg|anbo|egg meows at bofh
<egg|anbo|egg> bofh: catpaperpics
<egg|anbo|egg> bofh: rootn
<egg|anbo|egg> bofh: *swat*
* egg|anbo|egg meows at bofh
* bofh meows at egg|anbo|egg
<egg|laptop|egg_> meow
<egg|laptop|egg_> catpaperpicsrootndoubledouble
<egg|laptop|egg_> uax9
<UmbralRaptor> Is catpaper an x86 instruction yet?
<egg|laptop|egg_> more importantly is it a boneless instruction
<bofh> uax9?
<bofh> ohright
<bofh> RIGHT
<egg|laptop|egg_> bofh: also catpaperpics, rootn, doubledouble,
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<egg|laptop|egg_> zzz
<UmbralRaptor> Yes, but do you zzz in spherical harmonics?
<xShadowx> im starting to hate math
* xShadowx throws math in a hole with fire
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<UmbralRaptor> … what sort of math?
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<UmbralRaptor> "emergencies are just a special case of terrorism"
* UmbralRaptor lolsobs
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<egg|laptop|egg> bofh: meow
<bofh> egg|laptop|egg: meow
<egg|laptop|egg> bofh: so to reformulate the max abs associated legendre question, where is the first root of the (m+1)th derivative of Pn
<bofh> do we have a closed form or even a generating function or whatnot for the (m+1)th derivative of Pn?
<bofh> or, heck, even the first derivative?
<egg|laptop|egg> bofh: hm
<egg|laptop|egg> bofh: check that austrian pdf maybe
<egg|laptop|egg> meow
<egg|laptop|egg> bofh: can you see an obvious pattern to {-(1/2), -(5/2) + 28/(3 Sqrt[15]), (-50176 Sqrt[15] + 1215 Sqrt[2 (195 + Sqrt[393])] + 405 Sqrt[786 (195 + Sqrt[393])])/80640, 22/25 Sqrt[6/35 (21 - Sqrt[231])] + 22/75 Sqrt[22/5 (21 - Sqrt[231])] - 9/448 Sqrt[3/2 (6729 + 131 Sqrt[393])]}
<egg|laptop|egg> bofh: we need an oeis but for algebraic numbers,
* egg|laptop|egg pokes things with MinimalPolynomial
* egg|laptop|egg nopes
* egg|laptop|egg pets cat
<egg|laptop|egg> cat self-pets
<mlbaker> egg|laptop|egg: please no
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<kmath> <whitequark> @AmyZenunim if my three-story-high mom would pick me up and carry around that would be pretty fucked up
<egg|laptop|egg_> mlbaker: why not
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<UmbralRaptor> "cosmic ray telescope for the effects of radiation (CRaTER)"
<UmbralRaptor> "Lyman-Alpha mapping project (LAMP)"
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<egg|cell|egg> Cc bofh
<SnoopJeDi> Roy Glauber died this week :(
<bofh> Yeah :(
<SnoopJeDi> He gave a wonderful "memories of Los Alamos" talk here some years ago
<egg|anbo|egg> whitequark: did you ever figure out why the unrelated switch toggled a subset of your ceiling lamps
<kmath> <whitequark> there's a fan in the wall near the light switch. if I turn the fan on, precisely one ceiling lamp also turns on. th… https://t.co/9Ahlpfw25J
<SnoopJeDi> eggstremely cursed wiring
<egg|anbo|egg> i mean the phase 1 = phase 2 at ANBO was fun too
<egg|anbo|egg> this is boringly tame in comparison to phase 1 = phase 2 but amusing https://twitter.com/bofh453/status/1024048070085029888
<kmath> <bofh453> <@eggleroy> pair production in a 3-phase electrical installation, https://t.co/oA0ODFMJHH
<SnoopJeDi> I was talking to my gf's dad about wiring over the holiday. Mostly about how my parents live in a neighborhood that was pretty much all shoddy aluminum wiring because it was economical at the time.
<SnoopJeDi> ha! I'd be lying if I said I understood polyphase, but I grok it just enough for that joke
<_whitenotifier-6f89> [Principia] eggrobin synchronize pull request #2032: Selenopotential to degree and order 50 - https://git.io/fhvro
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<_whitenotifier-6f89> [Principia] eggrobin synchronize pull request #2032: Selenopotential to degree and order 50 - https://git.io/fhvro
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<_whitenotifier-6f89> [Principia] pleroy opened pull request #2042: An allocator based on arenas - https://git.io/fhI8h
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<_whitenotifier-6f89> [Principia] pleroy reviewed pull request #2032 commit - https://git.io/fhI4S
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<_whitenotifier-6f89> [Principia] pleroy reviewed pull request #2032 commit - https://git.io/fhI4H
<_whitenotifier-6f89> [Principia] pleroy labeled pull request #2032: Selenopotential to degree and order 50 - https://git.io/fhvro
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<kmath> https://twitter.com/scanlime/status/1078729345273712640 <scanlime> brotli has "big dictionary energy" i'm told
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<_whitenotifier-6f89> [Principia] eggrobin reviewed pull request #2042 commit - https://git.io/fhIRp
<_whitenotifier-6f89> [Principia] eggrobin reviewed pull request #2042 commit - https://git.io/fhIRh
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<xShadowx> UmbralRaptor: started with curves, and now quat math :
<xShadowx> :|
* raptop has never had a proper introduction to quaternions. >_>
<xShadowx> im trying to calculate where a spot on a polygon would be, with said polygon assumed to be curved ;s
<SnoopJeDi> raptop, https://acko.net/blog/animate-your-way-to-glory-pt2/#quaternions is an *excellent* write-up with nice animations.
<raptop> hrm
<SnoopJeDi> although the interactive Death Star...thing...is not my favorite.
<raptop> Bah, this computer isn't fast enough to deal properly with those animations.
<_whitenotifier-6f89> [Principia] pleroy reviewed pull request #2042 commit - https://git.io/fhIgz
<xShadowx> so have position a b c for 3 points in 3d space, d e for their coordinate in 2d space, f g h for their rotation, then have x y for a 4th 2d point, that needs to be converted to a 3d point along the curved surface created by the first 3 points :|
* xShadowx has a headache
<SnoopJeDi> yea, they're javascripty so it's a little demanding
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<_whitenotifier-6f89> [Principia] eggrobin closed pull request #2032: Selenopotential to degree and order 50 - https://git.io/fhvro
<_whitenotifier-6f89> [Principia] eggrobin pushed 19 commits to master [+2/-0/±67] https://git.io/fhIVk
<_whitenotifier-6f89> [Principia] eggrobin af7d634 - geopotential formatting
<_whitenotifier-6f89> [Principia] eggrobin 0ff290a - GL1500E to degree and order 50
<_whitenotifier-6f89> [Principia] eggrobin 01157bf - protobuf does not like +
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<egg|anbo|egg> classic: flying cat https://www.youtube.com/watch?v=J_8mdH20qTQ
<kmath> YouTube - Remove cat before flight
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<egg|anbo|egg> UmbralRaptor: something is foghorning
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<UmbralRaptor> High visibility cows.
<egg|anbo|egg> foghorning *a lot* actually
<egg|anbo|egg> admittedly the fog is quite thick, i can't see the lighthouses across the river and the sky is shining orange upward of 60 deg from nearby street lamps
<egg|anbo|egg> still that's a lot of honking
<egg|laptop|egg> now it's stopped honking but i hear the engine
<egg|laptop|egg> and a lamp hovering through the fogge and filthie ayre
<egg|laptop|egg> WOW it's foggy
<egg|laptop|egg> wtf
<UmbralRaptor> … it's foggy in NoVa also
<kmath> <✔Alex_Parker> As we approach our new target in the Kuiper Belt, here’s a brief look back at where we’ve been. This is every singl… https://t.co/tHxk9q6Fi2
<egg|anbo|egg> bofh: catpics with papers!
<egg|anbo|egg> oh hey honking again