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> 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> !wpn -add:adj alternating
<galois> Added adj 'alternating'
<egg|laptop|egg> !wpn -add:adj multilinear
<galois> Added adj 'multilinear'
<egg|laptop|egg> !wpn -add:adj linear
<galois> Entry already exists!
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* UmbralRaptor pokes Jackson with a dielectric
<UmbralRaptor> On which I fail to do anything useful with setting up problem 3 http://complex.gmu.edu/phd/exam/EM-Aug-2019.pdf
<UmbralRaptor> *In
<UmbralRaptor> It definitely doesn't help that there are two plausible origins for those spherical harmonics
<UmbralRaptor> !wpn egg, SnoopJeDi, mofh, mlbaker
* galois gives egg, SnoopJeDi, mofh, mlbaker a gallium Weyl scholarship
* UmbralRaptor 🔪 things
<UmbralRaptor> Apparently it's problem 4.9a in Jackson
<UmbralRaptor> Also, I found this (probably more useful to dx than anyone else) https://www.researchgate.net/publication/303408019_Solutions_to_Jackson's_book_Classical_Electrodynamics_-_3th_Edition
<galois> Sorry, I can't make sense of that URL.
<UmbralRaptor> Yes, it has a DOI for some reason
<UmbralRaptor> … I swear, this solution was written by Jackson
<UmbralRaptor> actually useful http://www-personal.umich.edu/~pran/jackson/
<galois> title: U-M Personal World Wide Web Server
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<dx> UmbralRaptor: nya?
<egg|laptop|egg> mlbaker: that appears to be the case in 3d at least
<dx> actually what does the 'dx' in dx.doi.org even mean
<egg|laptop|egg> clearly it's you
<egg|laptop|egg> mlbaker: now what about the thing on larger subsets :D
* egg|laptop|egg pokes mofh in the linear algebra
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<UmbralRaptor> dx: the solutions in that document are in Spanish
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<UmbralRaptor> (and I think you're the only person in this channel who's proficient in that language?)
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<UmbralRaptor> given that WMATA trains sometimes get lost, this seems useful https://twitter.com/bofh453/status/1215172154746134528
<galois> title: 🇭🇰 Peter Barfuss 𒀱 on Twitter: "(Comically, the relevant JSON blob also gives you the GPS coordinates of your destination train station, in case uhh the train operator gets lost going to their own station? No clue, I'm baffled at that. But it's otherwise a very nice API, & seems to update every 5 seconds)."
<egg|work|egg> !wpn UmbralRaptor
* galois gives UmbralRaptor an integral with a diamond attachment
<egg|work|egg> !wpn whitequark
* galois gives whitequark a gladius
<UmbralRaptor> !wpn egg|work|egg
* galois gives egg|work|egg a healthy embolism
<UmbralRaptor> uh
<egg|cell|egg> Um
<whitequark> lol
<whitequark> !wpn egg
* galois gives egg a Tits andesitic horizon
<egg|work|egg> I could easily see a Tits horizon being a thing
<egg|work|egg> andesitic less so
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<UmbralRaptor> yeah, they're usually granitic https://en.m.wikipedia.org/wiki/Grand_Teton
* UmbralRaptor 🔪 🚌 again
<mofh> okay that was a *bit* of unneeded ""excitement""
<mofh> my laptop briefly caught on fire (it still works perfectly fine afterwards, thank heavens).
<UmbralRaptor> erm
<whitequark> what part of it did?
<UmbralRaptor> hrm. eduroam has failed me
<egg|work|egg> O_o
<egg|work|egg> !wpn
* galois gives egg|work|egg a comment
<egg|work|egg> !wpn
* galois gives egg|work|egg an atlatl
* egg|work|egg pokes mofh's laptop with the atlatl
<UmbralRaptor> !wpn -add:adj celebratory
<galois> Added adj 'celebratory'
<UmbralRaptor> !wpn -add:adj halon
<galois> Added adj 'halon'
<UmbralRaptor> !wpn -add:wpn extinguisher
<galois> Added wpn 'extinguisher'
<egg|work|egg> hah
<egg|work|egg> !wpn whitequark
* galois gives whitequark a moment
<UmbralRaptor> woo, neither wifi network can ping L3 or Google DNS servers
<UmbralRaptor> other Fun things: a toilet continuosly putting out enough water to partially flood a bathroom
<egg|work|egg> Cursed:
<egg|work|egg> > However, if any normalization form is applied, including NFC, the characters will be decomposed
<egg|work|egg> cc whitequark, mofh
<egg|work|egg> (Unicode standard version 11.0, core specification, volume 2, chapter 21 notational systems, section 21.2 western musical symbols, paragraph "precomposed note characters", p. 780
<egg|work|egg> )
<egg|work|egg> !u 𝅘𝅥𝅯
<galois> 𝅘𝅥𝅯: U+1d161 MUSICAL SYMBOL SIXTEENTH NOTE
<egg|work|egg> !u
<egg|work|egg> !u 𝅘𝅥𝅯
<galois> 𝅘: U+1d158 MUSICAL SYMBOL NOTEHEAD BLACK
<galois> 𝅥: U+1d165 MUSICAL SYMBOL COMBINING STEM
<galois> 𝅯: U+1d16f MUSICAL SYMBOL COMBINING FLAG-2
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<UmbralRaptor> !wpn
* galois gives UmbralRaptor a fish with a saber attachment
<UmbralRaptor> beware the troutslap
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<SnoopJeDi> tensorflow.contrib.slim.python.slim.data.dataset 😨
<SilverFox> so like, all transfers of kinetic energy are not 100% efficient because there's heat generated from the impact right?
<SilverFox> for example, two pool balls hitting each other, or cooking a chicke via slapping it
<SnoopJeDi> SilverFox, perfectly elastic collisions exist in particle physics contexts. For macroscopic collisions, it's an abstraction, yes.
<SilverFox> which contexts of particle physics?
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<SnoopJeDi> SilverFox, perhaps this introductory page will answer some of your questions https://hypernews.slac.stanford.edu/slacsite/aux/HiPPP/scattering/index.html
<galois> title: Elastic and Inelastic Collisions in Particle Physics
<SnoopJeDi> The punchline is that it's still an abstraction there, too. Energy can be radiated away as e.g. photons
<SilverFox> okay but my question will eventually boil down to, do photons, which transfer momentum, transfer heat thusly?
<SilverFox> do solar sails get heated up from the impact of photons?
<raptop> Ideal (perfectly reflective) ones do not. In reality, absorption, etc does some. Heating is more of an issue with laser sails, IIRC
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<raptop> So, qual/electromagnetism related question
<SilverFox> its not that heating is an issue, I dont care about how much heat it is, just that it exists
<SilverFox> because then you can never achieve an albedo of 1
<raptop> I got https://photos.app.goo.gl/37ATgefi6v5mBtdp7 but want to know if I did something wrong
<galois> title: Shared album - Patrick N - Google Photos
<raptop> SnoopJeDi: something something sails aren't perfectly rigid?
<raptop> Hrm, the thumb in that pic suggests than I'm holding a human hostage, and forcing them to transcribe things for me
<SnoopJeDi> raptop, sails?
<SnoopJeDi> oh, you meant that for SilverFox
<SnoopJeDi> SilverFox, "transfer heat" is an oxymoron
<SnoopJeDi> or uh, redundant, rather
<SilverFox> raptop, that picture wont stop me cause I can't read!
<raptop> Tired: transferring heat via photons
<raptop> wired: transferring heat via phonons and electrons
<SilverFox> cat scans fucking suck btw
<SilverFox> dont recommend them
<raptop> Yeah, you should do scans with eyes that have better angular resolution and just light things up better
<raptop> Anyway, why did you need one?
<SilverFox> medical stuff
<SilverFox> more testing of my complicated condition
<raptop> ah
<SilverFox> although we're closing in on something I have strong feeling about
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<_whitenotifier-d13c> [Principia] eggrobin commented on pull request #2436: Bulletin C 59 - https://git.io/JvvCA
<raptop> "Why does he have fox ears and a floofy tail?" "Dunno, let's run more tests"
<galois> title: The silver fox domestication experiment | Evolution: Education and Outreach | Full Text
<SnoopJeDi> apparently a domestic disposition and uwu features are phenotypically linked
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<raptop> !choose nekonomicon|necronyaamicon
<galois> raptop: Your options: nekonomicon, necronyaamicon. My choice: necronyaamicon
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<SilverFox> sometimes the side chick aint even a chick, it's a TI-84 graphing calculator
* uovo pokes mofh in the flaming laptop
<egg|laptop|egg> mlbaker: any new insights on the wedged weirdness?
<mlbaker> not yet
<mlbaker> hey, since V carries an inner product, maybe we should try to think about this from the perspective of the Clifford algebra Cl(V,<–,–>)
<UmbralRaptop> 🔴🐕 algebra
<mlbaker> yes, the big red dog algebra
<uovo> red dog?
<galois> [WIKIPEDIA] Clifford the Big Red Dog | "Clifford the Big Red Dog is an American children's book series about a giant red dog named Clifford. It was first published in 1963 and was written by Norman Bridwell (1928–2014). The series helped establish Scholastic as a premier publishing company, and Clifford is Scholastic's official mascot...."
<raptop> yeah, that
<egg|laptop|egg> mlbaker: I am not at all familiar with it tbf
<egg|laptop|egg> s/bf/bh/
<galois> egg|laptop|egg meant to say: mlbaker: I am not at all familiar with it tbh
<egg|laptop|egg> (it being the Clifford algebra, not the big red dog)
<egg|laptop|egg> (I mean, I don't know about the big red dog either)
<egg|laptop|egg> 🐕(V, ⟨·, ·⟩)
<galois> [WIKIPEDIA] Exterior algebra#Basic Properties | "In mathematics, the exterior product or wedge product of vectors is an algebraic construction used in geometry to study areas, volumes, and their higher-dimensional analogues. The exterior product of two vectors u and v, denoted by u ∧ v, is called a bivector and lives in a space called the exterior..."
<SnoopJeDi> !wpn -add:adj Clifford
<galois> Added adj 'Clifford'
<SnoopJeDi> !wpn -add:adj big
<galois> Added adj 'big'
<SnoopJeDi> !wpn -add:adj red
<galois> Entry already exists!
<galois> [WIKIPEDIA] Exterior algebra#Technical details: Definitions | "In mathematics, the exterior product or wedge product of vectors is an algebraic construction used in geometry to study areas, volumes, and their higher-dimensional analogues. The exterior product of two vectors u and v, denoted by u ∧ v, is called a bivector and lives in a space called the exterior..."
<egg|laptop|egg> I think that's our maps right there
<egg|laptop|egg> wedge^p A^k
<egg|laptop|egg> the citation for that bit is https://sites.google.com/site/winitzki/linalg
<galois> title: Sergei Winitzki's Projects - Linear Algebra via Exterior Products: book web site
<egg|laptop|egg> that seems to be the only citation for this section so I'm not sure how standard that notation is
<egg|laptop|egg> mlbaker: the book calls that the "the k-linear action of a linear operator A in the space ⋀^n V"