03:00 <raptop> !meow

03:00 <galois> (^=◕ᴥ◕=^)

03:03 <egg|anbo|egg> raptop: https://github.com/mockingbirdnest/Principia/pull/3113

03:03 <galois> title: Лидов–古在 by eggrobin · Pull Request #3113 · mockingbirdnest/Principia · GitHub

03:19 <raptop> LGTM, I think (sadly I can't do a proper code review)

03:28 <queqiao-> ⟨e​gg|matrix|egg⟩ confused by c2

05:24 <raptop> cc: egg: https://twitter.com/alt_kia/status/1429671545446694924

05:27 <queqiao-> ⟨e​gg|matrix|egg⟩ What illusions would they have to lose

05:28 <raptop> unsure. surprise at there being far fewer guns than expected?

11:36 <egg|anbo|egg_> https://twitter.com/ChinaScience/status/1429730136883089413

11:50 <UmbralRaptop> hm

14:25 <raptop> !8 Spend the first x weeks of the semester meeting remotely and staying off campus?

14:25 <galois> raptop: yes

14:29 <raptop> cursed realization that you could probably put Czech hedgehogs all over a place and claim that it's an art project

14:50 <raptop> (transportation is left as an exercise to the reader)

15:16 <queqiao-> ⟨e​gg|matrix|egg⟩ why czech

15:20 <raptop> https://en.wikipedia.org/wiki/Czech_hedgehog

15:20 <galois> [WIKIPEDIA] Czech hedgehog | "The Czech hedgehog (Czech: rozsocháč or ježek) is a static anti-tank obstacle defense made of metal angle beams or I-beams (that is, lengths with an L- or I-shaped cross section). The hedgehog is very effective in keeping light to medium tanks and vehicles from penetrating a line of defense; it maintains..."

15:31 <egg|anbo|egg_> ah, a bit like Frisian horses

15:32 <egg|anbo|egg_> https://fr.wikipedia.org/wiki/Cheval_de_frise_(barri%C3%A8re)

15:32 <galois> [WIKIPEDIA] Cheval de frise (barrière) | "Un cheval de frise est un type de barrière de défense utilisée depuis au moins la protohistoire, devant les remparts des oppida."

15:33 <raptop> yep

15:33 <egg|anbo|egg_> but what if you put actual hedgehogs all over the place

15:34 <raptop> Also, don't confuse them with those hedgehogs the brits invented

16:35 <egg|anbo|egg_> An earlier version of https://github.com/mockingbirdnest/Principia/pull/3113 previously linked here had a graph showing a mysteriously non-constant c₂. This was due to substituting i for ω in the expression for c₂. The error has now been rectified, and one can now see that it is indeed an integral of motion. The editors would like to apologize for the confusion.

16:35 <galois> title: Лидов–古在 by eggrobin · Pull Request #3113 · mockingbirdnest/Principia · GitHub

16:37 <raptop> :D

16:38 <queqiao-> ⟨e​gg|matrix|egg⟩ The results from Лидов’s paper replicate extraordinarily well

16:38 <queqiao-> ⟨e​gg|matrix|egg⟩ Does Kozai also have c₂?

17:12 <raptop> . o O (more delta-vee, less delta-variant)

17:24 <raptop> email subject: "This is a fourth reminder to reorder checks."

17:24 <raptop> ...I go through sufficiently few that I only need to order new ones every other year

17:45 <queqiao-> ⟨e​gg|matrix|egg⟩ raptop: clearly you should move to France

17:48 <raptop> And work at ESO?

17:49 <queqiao-> ⟨e​gg|matrix|egg⟩ or in Nice

17:49 <raptop> Working at Nice means I have to do n-body models of the early solar system, right?

17:50 <queqiao-> ⟨e​gg|matrix|egg⟩ they might do other things too :-p

17:50 <queqiao-> ⟨e​gg|matrix|egg⟩ (also obligatory: is there an astronomical institute in Lyon?)

17:50 <queqiao-> ⟨e​gg|matrix|egg⟩ (Lyon is in the Rhône department which is number 69)

17:51 <raptop> ah

18:11 <raptop> OH: "My summer break is Tuesday"

19:19 <UmbralRaptop> https://twitter.com/mbeisen/status/1429881914811306018

22:30 <egg|anbo|egg_> https://github.com/mockingbirdnest/Principia/blob/4c5d6bc0bde17216b59a3d1238690b868687918b/astronomy/orbital_elements_body.hpp#L234-L236

22:30 <galois> title: Principia/orbital_elements_body.hpp at 4c5d6bc0bde17216b59a3d1238690b868687918b · mockingbirdnest/Principia · GitHub

23:58 <raptop> !wpn

23:58 <raptop> Is galois saying I should blog more?