Math wiki.

@Rod916 "The most widely known string metric is a rudimentary one called the Levenshtein distance (also known as edit distance)."

I'd dispute that. I'd argue that Hamming distance is more widely known (and more obvious).

@dani And correspondingly, 3[arr] is valid C.

@zatnosk @jk True, but weaving is a solved problem at this point. All you need to print is the fibres, and then weave them together in the right order, surely.

Przyblyski's Star: A star with more praesodymium in its spectrum than iron. Is it aliens? Maybe, but unlikely. Is it a measurement error? Probably not. Is it evidence of the island of stability? Surprisingly, this might be the most likely outcome. Is it weird as fuck? YES.

en.wikipedia.org/wiki/Przybyls

@jk Given that the origin of programming is intricately tied with (pun intended) looms, I'm surprised there hasn't been a greater effort to 3d-print and weave clothing.

TeX in real world production

@pkra Needs some \textrm or \operatorname around Spin, and depending on your preference SO, and SU, too, IMO.

Notice me, 0 If you get it, you get it

@tfp_math Haven't mentally groaned that hard in a while. Fair play.

Obscure-ish topic, but does anybody here have any textbook / expository paper recommendations for contact geometry?

It's been a while now since my degree, but I've had to help out a sibling with some thermodynamics homework, and it's sparked my interest in the geometric side of physics again.

I've think I've got a new favourite paper.

"The Meanderings of a Weapon Oriented Mind When Applied in a Vacuum Such as the Moon"

@Mia They do, they're just orthogonal to you. Thus their projection onto you is zero, and there is no overlap or interaction.

(I love how overloaded the word "normal" is in mathematics 😂 )

@yojimbo @nomad If you haven't seen it already, let me introduce you to "Atomic Rockets",

projectrho.com/public_html/roc

Super useful resource for writing hard sci-fi, and I reference it all the time. I actually first encountered the idea of AEA from "A Deepness in the Sky"! But I first saw it formalised on the page I linked in my last toot, which I stumbled on from the atomic rockets measurement page.

There's a ton of fascinating, if not necessarily useful (unless you're writing SF) stuff on there.

@nomad @yojimbo Just use UNIX time for everything—or, even better and exactly the same, After Epoch Astronauticum: transform.to/%7Edragondm/aea.h i.e. time since Neil Armstrong landed on the moon, with the epoch rounded up to the nearest year.

usb, inconceivable!

@pkra You keep using that word; I do not think it means what you think it means.

But I feel you. I'm always out of the exact USB cable I need, be it micro, mini, type-A, type-B, or C.

Obscure-ish topic, but does anybody here have any textbook / expository paper recommendations for contact geometry?

It's been a while now since my degree, but I've had to help out a sibling with some thermodynamics homework, and it's sparked my interest in the geometric side of physics again.

@jsiehler I like to use $$(\xi, \upsilon, \zeta)$$ instead of adding primes, i.e. $$(x', y', z')$$.