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Adam
Adam
16:07
Yay for used books. I got a copy of Allen's Vox Latina cheap. My personal Latin library continues to slowly grow. tents fingers
Joonas Ilmavirta
Joonas Ilmavirta
@Adam Excellent!
It would be unwise to build your personal Rome in a day.
Adam
Adam
@JoonasIlmavirta Wise words.
At 9000+ pieces, I don't think even the colosseum could be built in a day. lego.com/en-us/product/colosseum-10276
Joonas Ilmavirta
Joonas Ilmavirta
16:49
@Adam I don't think it should. It probably takes too long anyway, but even if it didn't, I'm sure your chiropractor would be opposed to it.
 
4 hours later…
Adam
Adam
21:16
@JoonasIlmavirta Good thing I don't have a chiropractor, space, nor budget.
Sebastian Koppehel
Sebastian Koppehel
21:56
Aha, the winter bash is actually a winter/summer bash. Good to see the evil of hemispherism is finally being combated.
Adam
Adam
@SebastianKoppehel Shh... flat-earthers might hear you.
Sebastian Koppehel
Sebastian Koppehel
@Adam How do they think winter and summer happen, I wonder.
(Probably best not to ask, I'm sure a veritable rabbit hole is waiting for any who do.)
Joonas Ilmavirta
Joonas Ilmavirta
@Adam A flat earth has two sides, right? Don't ask me how to travel between them, though...
Adam
Adam
Maybe they think the sun is a frisbee being thrown across the disc of the earth by hippy Jesus.
Joonas Ilmavirta
Joonas Ilmavirta
@SebastianKoppehel I'm sure those who don't have summers and winters but other seasons are planning a riot. The bash needs to include the rainy season and what not!
Sebastian Koppehel
Sebastian Koppehel
22:08
But wait, can you stand on the lower side?
Joonas Ilmavirta
Joonas Ilmavirta
@SebastianKoppehel If gravity works as normal, then yes, assuming that the earth magically holds the flat shape. But I confess to not knowing how flat-earthers model their gravity.
Or perhaps you have to stand on your hands?
Adam
Adam
I thought the underside just has giant table legs.
Joonas Ilmavirta
Joonas Ilmavirta
@Adam No no no, those legs belong to a turtle.
Adam
Adam
Oh, I forgot about all the turtles.
Do they believe in turtles? Their shells are pretty round.
Joonas Ilmavirta
Joonas Ilmavirta
@Adam Flat-shelled turtles, of course.
Otherwise a turtle would too easily slip off the one underneath.
Logic!
Sebastian Koppehel
Sebastian Koppehel
22:13
Where I come from, it's always rainy season.
Adam
Adam
@JoonasIlmavirta Magnificently simple, therefore it must be true.
@SebastianKoppehel Funny, we've been watching the series "Dark" on Netflix and it feels like it rains constantly.
Not that I have any idea where in Germany the town of Winden is supposed to be.
Sebastian Koppehel
Sebastian Koppehel
@Adam Simplex sigillum veri!
Adam
Adam
@SebastianKoppehel Ho ho ho!
Maybe if flat-earthers put everything in Latin it would look and sound more legitimate.
Sebastian Koppehel
Sebastian Koppehel
22:29
@Adam Nor do I, but apparently the movie was made near Berlin. But I think the atmosphere is more of a stylistic choice.
Adam
Adam
@SebastianKoppehel I figured as much since everyone seems completely adverse to using umbrellas.
We just finished season 2 and will start watching the last season tonight. Maybe things will dry up.
Joonas Ilmavirta
Joonas Ilmavirta
I have to point out that the Earth is conformally flat.
A perfectly round sphere is conformally flat in its intrinsic geometry.
Cerberus
Cerberus
Can a part of a flat thing be non-flat?
Adam
Adam
22:44
Is that to say that the Earth is large enough that moving from one point on it to another is essentially a flat movement?
Joonas Ilmavirta
Joonas Ilmavirta
@Cerberus Depends on one's definition of flat. I, as a differential geometer, have to say no.
Being flat means that the Riemann curvature tensor vanishes. I'm sure everyday parlance agrees with that.
I was thinking of general dimension, but the surface of our planet is two-dimensional, so it's automatically conformally flat.
Cerberus
Cerberus
Yeah, definitions are crucial.
Joonas Ilmavirta
Joonas Ilmavirta
@Adam That's true in any geometry to a good accuracy as long as the movement is small compared to curvature.
Cerberus
Cerberus
@JoonasIlmavirta Can a part of a perfectly round sphaere be non-flat?
Joonas Ilmavirta
Joonas Ilmavirta
@Cerberus A perfectly round sphere is not flat anywhere, but it's conformally flat everywhere.
It's a crucial property of a sphere that their curvature is constant.
Cerberus
Cerberus
22:51
OK there is just 10 different words that are defined in ways unknown to me.
Which is quite understandable, considered that this is academic mathematics.
Joonas Ilmavirta
Joonas Ilmavirta
@Cerberus And not something that most people see if they only get a master's degree in mathematics.
@Cerberus I have to apologize for that, but I also couldn't resist.
Cerberus
Cerberus
@JoonasIlmavirta Ah, I see. Only a master's degree.
@JoonasIlmavirta No need to apologise: that's just how science often must be.
Joonas Ilmavirta
Joonas Ilmavirta
@Cerberus Depends on the university, but that's my impression. Just about everyone takes a course on or is at least exposed to differential geometry in grad school.
It's not unusual that a good definition of something like curvature builds on quite a bit of foundation.
Cerberus
Cerberus
I'll believe it.
I can barely glimpse what it is about at all.
In high school, I remember we used integrals to describe three-dimensional surfaces.
I can imagine surfaces' being described in geometrical terms.
Could that be related in any way?
Adam
Adam
23:23
I barely remember anything from anything beyond fundamentals at this point. I suppose it would come back if I re-read.
Cerberus
Cerberus
23:37
Yeah you'll pick it up again quickly.
Adam
Adam
23:51
2 + 2 = 4, woah, it's all coming back, watch out, I'm going to be solving impossible proofs.

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