@jsiehler Shit this reminds me of an issue I ran into with mathematica years ago, but I'm slightly too drunk to fully recall. IIRC there's some underlying assumptions related to positivity and avoiding complex answers that causes this. Obviously ContourPlot[y+x==0, ...] works.

Feel free to message me tomorrow or over the weekend for a more sober investigation.

"Irish Dara Ó Briain has received an award for his contribution to raising public awareness of .

This is an award that is presented each year during Maths Week – the annual all-island festival of maths and numeracy, which is currently running with events across the country and online."


@JordiGH Wouldn't that fall under extortion in most places anyway?

My ISP seems to be hijacking all DNS requests, regardless of server, so that they can blackhole facebook traffic (facebook.com is being routed to I can run DNS queries against example.com and still get results:

@Rod916 "Knowledge = power = energy = matter = mass; a good bookshop is just a genteel Black Hole that knows how to read.”"

@JordiGH Tempting, but I'll pass. I'm not as morally opposed to DRM as I used to be (maybe I've just given in in recent years), I can see its merits for content creators in a capitalist world where copying is cheap and ubiquitous. But obviously, from a consumer perspective, I'm against it.

That being said it's dumb for the pure reason that it's not physically possible to solve the analog hole. (That is until we all have neural implants blocking any unauthorized content from our visual cortices)

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).

@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.


@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",


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.

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