@SvenGeier@mathstodon.xyz
@SvenGeier@mathstodon.xyz avatar

SvenGeier

@SvenGeier@mathstodon.xyz

Geometry, Physics, Art, Math.

https://scholar.google.com/citations?user=G0JsJQMAAAAJ

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UnFitz2, to random

“I think 14 cups of coffee may have been overdoing it” he panted, by then more squirrel than man.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@devxvda @UnFitz2 strictly speaking you can talk to bees no matter how much coffee you've had. But after 15 cups their replies make sense...

batkaren, to random
@batkaren@mastodon.online avatar

Another new job, another abandoned asylum infested with spectral horrors.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@batkaren maybe you're in a rut? There's more to life than just abandoned asylums - try an abandoned carnival, or an abandoned prison for a change. Live a little.

Wildethingy, to random

They say swans mate for life but I bet if I gave a swan enough tequila I could totally get it to cheat.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@Wildethingy If I was a swan and it's late and I'm drunk and Leda came up to me...

ReticentTurnip, to random

Oh, you think I'm a failure? Listen, jackass—the only thing I've failed at is succeeding

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@ReticentTurnip If you try to fail, and you succeed, have you?

LadyDragonfly, to random

"Welcome to our gander reveal party!"

"Don't you mean..."

"No."

Geese emerge from everywhere. There are no fireworks. Only geese. There are no balloons. Only chaos. There are no genders. Only honk.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@LadyDragonfly turns out the phrase "There are no genders. Only honk." has surprisingly wide applicability all across human society.

lowqualityfacts, to random
@lowqualityfacts@mstdn.social avatar

Amazing.
https://patreon.com/lowqualityfacts

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@lowqualityfacts
He could ... but he didn't. Because he was kind of a dick.

azedand2knots, to random
@azedand2knots@beige.party avatar

A colony of ants has set up shop in my occipital lobes.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@azedand2knots Ants? Is that better or worse than squirrels? Because I definitely have squirrels...

batkaren, to random
@batkaren@mastodon.online avatar

Your eye’s been twitching for months, and only now do you realize the tics are repeating…in Morse code…

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@batkaren "we have been trying to reach you about your car's extended warranty...'

johncarlosbaez, (edited ) to random
@johncarlosbaez@mathstodon.xyz avatar

A common name for the inverse sine function is

arcsin 𝑥

The usual name for inverse hyperbolic sine function is

arcsinh 𝑥

Now some Wikipedians have decided to start calling it

arsinh 𝑥

I've never seen this before and it makes me think "arse". I don't like it!

A more common alternative is

sinh⁻¹ 𝑥

Some computer scientists use

asinh 𝑥

Some pedants, claiming that hyperbolic trig functions aren't connected to arcs, argue for

argsinh 𝑥

Who came up with "arsinh" and why? Is it too late to kill off this notation? It seems like a case of Wikipedia editors run amok. It reminds me of how some of them made up their own very precise definition of "order of magnitude" - and now run around correcting people who say "to within an order of magnitude" if it doesn't match their made-up definition.

When I want to be understood I'll use "arcsinh". When I want to act mathematical I'll use "sinh⁻¹". If I wanted to save space I'd write "asinh". I might use "argsinh" if I were pretending to be a pirate. But I'd only use "arsinh" if I wanted to be an arse.

By the way, I don't like debates about notation. So I don't know why I'm talking about this when I have more interesting things to talk about. Just blowing off steam, I guess.

https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions

SvenGeier,
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@johncarlosbaez but also consider

johncarlosbaez, to random
@johncarlosbaez@mathstodon.xyz avatar

A phone call woke me up from a dream. I'd been reading a book called The Odd Numbers, about an odd prime seeking romantic companionship and not finding it amid a sea of even primes.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@johncarlosbaez now you know what it's like to be an even prime...

ncweaver, to random
@ncweaver@thecooltable.wtf avatar

Wow, I got the first "asshole pronoun obsessed lunatic" email using a throwaway account in response to a mastodon toot, because I used the preferred pronoun of someone.

Who knows, Mastodon could replace Twitter after all!

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@ncweaver Every single person getting all upset about preferred pronouns ... has a preferred pronoun.

delong, to random
@delong@mastodon.social avatar

I Had Been Unaware of How Many People Are Claiming Chat-GPt5 Will Be "Emergent" & Will "Generalize" & Be Nearly "AGI"

I find that I really cannot believe them. Indeed, I am wondering if how many of them are the same people as those who were the crypto hype-grift artists last year…
<https://braddelong.substack.com/p/i-had-been-unaware-of-how-common>
2023-05-01 Mo

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@delong It does not have to function "like a human" to be dangerous. If it's good enough to outwit, out-flank, circumvent our attempts to shut it off, reprogram it, fix it, control it, then we can haggle all day whether it "technically counts as intelligent" - it's outsmarting us, and has goals that aren't ours. It doesn't need more to be worthy of attention.

alexdbolton, to random
@alexdbolton@mathstodon.xyz avatar

A tricky one: there are 101 positive integers in a circle that sum to 300, prove that there exists a contiguous subarray that sums to 200

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@alexdbolton I'm unclear what "contiguous" means in this context. I read "in a circle" in the sense of "in a set" - but maybe you mean "arranged in a circle"? Then it would be unclear why the arrangement matters for addition? Maybe it's just too late here...

batkaren, to random
@batkaren@mastodon.online avatar

As one ages, the term “butt stuff” becomes more ambiguous, most likely now referring to medication.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@batkaren Of course the term "medication" also shifts in meaning away from the recreational variant...

christianp, to random
@christianp@mathstodon.xyz avatar

Calculator? Not if I calc you first!

SvenGeier,
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@christianp Calculator? I barely know her ...

christianp, to random
@christianp@mathstodon.xyz avatar

Last night I slept in every bed. Mrs L-P slept in just one bed, but with each member of the family in turn.
This is called co-sleeping.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@christianp My co-ndolences. Or co-ngratulations, whatever may seem more appropriate...

roxiqt, to random

I don't know who needs to hear this but if you start your day by staging a cat wedding where you lure the bride & groom cats down the aisle with cat nip, it's okay. It's also okay to make a fish shaped wedding cake for your cats. You can give them little fancy outfits too.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@roxiqt it doesn't even have to be cats. Racoons, skunks, even oppossums enjoy fancy weddings too..

Danpiker, to random
@Danpiker@mathstodon.xyz avatar

How many different ways can 4 equal circles be linked in 3d space?

-not counting solutions composed of multiple separate links
-no touching or crossing of the circles
-true geometric circles only, not elongated or distorted
-considering topologically equivalent arrangements to be the same

How about 5 circles? Has someone already catalogued these?
I've seen some enumerations of planar arrangements, and link tables allowing non-circular loops, but didn't find yet one for circles in space.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@Danpiker
Do these three rings count as all linked?

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@Danpiker @0x10f
My brain wants to see something about chirality in this problem: two rings can only be linked in a mirror symmetric way, but three rings can be linked such that the resulting shape has handedness, i.e. that the same "new blue ring" linked in the same way will yield two different answers.

But every attempt at formalizing that fails at the lack of structure on the rings - it's much easier to see chirality when I imbue the rings with a direction (normal to the plane of the ring through the center) which implies a rotational direction via the right hand rule -- and suddenly I can see why any one linkage can be an enantiomer of another one. A direction allows me to paint the rings with a "red side" and a "blue side" and a different ring passing through now either goes "from red to blue" or "from blue to red". Except that this is "too much structure" in that it now shows that two rings can be linked in two different ways.

I haven't found the right "intermediate amount of structure" yet that would yield the answers that seem intuitive by just playing with rings in my raytracer...

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@Danpiker @0x10f
I think there are at least two ways to insert a "new fourth" ring ... uh ... "horizontally" into the three given ones:

Aikiwomannc, to random
@Aikiwomannc@beige.party avatar

Interviewer: So you were a Chernobyl tour guide?

Me: Yes, I was.

Interviewer: I see you have glowing reviews.

Me: Yeah, you might want to put those down.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@Aikiwomannc I can count on one hand the number of times I've been to Chernobyl. It was seven times.

maxleibman, to infosec
@maxleibman@mastodon.social avatar

Some password advice from an infosec professional:

Good password hygiene means choosing a password that is hard to guess.

One that's hard to type. Hard to remember. Hard to think about. Hard to LOOK at.

A password that makes you feel disoriented, uncomfortable.

In short, your password should be a Cthulhu.

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@maxleibman

Pshaw, I've been using p̵̢̫̙̥͕͉͔̰̙̻̪͒̆̈̏̀̆̾̚̚͘͠à̷̧̰̹̦̘̉̓͛͒̉̕͘͠s̸̛͕̤̮͖̙̰̺̿̐̐͐̎̃̓́͛̅͘͘s̴̢̻͈̙͋̓͋͐͐͝w̵̡͈̠͖̐̈́̏͝o̸̡̢̘̖̙̭͕͔̺͔̙̘̭̲͊̂̆̋̊̎̌̀̍͊ŗ̷̩͓͓̱̜͇̳̝̞̝̫͍͙̬͛͊̂͋͊̉͆̉́̓͌d̸̢̨̻̳͔̖̯͖̀͋͗̔́̈͑̀͒͂̆̿͗͝1̷̡̢̛̺̙̖͍̺̘̤͕̞̲̐͛̔̀̐́͒̍̉͂͋̌̅͌ͅ my whole life and nobody has ever guessed it...

batkaren, to random
@batkaren@mastodon.online avatar

“I’ll miss this place,” the graduating senior says.

“You’ll see it again.” I smile. “In dreams, whenever you have anxiety. It won’t be exactly the same… That’s why you’ll be lost. And late for class. Then realize you haven’t attended all year. There’s a test.”

“Wh—“

“You haven’t studied.”

SvenGeier,
@SvenGeier@mathstodon.xyz avatar

@batkaren
"You're not wearing any pants"

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