In this video I describe all the functions that are equal to their own n-th derivative, and also define the infinite family of "spiral trigonometric functions", which include the usual exponential, sine, and cosine functions as special cases #math #differentialequation #trigonometry #spiral

no one came to my office hours this morning so I just spent an hour being furious about symmetric bilinear forms instead

The “spiral trigonometric” functions, named coss(x) and sins(x) by @mathandcobb.bsky.social. These are solutions to the third-order differential equation y'''=y.

“it is neglect of the highest order to look children in the eyes and say we knew how to protect you and we just didn’t do it.”

who wants to be on my (entirely fictional) roller derby team, the degenerate conics

If you want to get in on the celebrations, one of the most bisexual stories in North Continent Ribbon is free to read online: cossmass.com/stories/the-...

It was the best of times, it was the end of times

Only a good guy with autism can defeat a bad guy with autism

proving nullstellensatz is the most ridiculous game of connect the dots that I've ever seen

When writing Analysis proofs in the midwest, important to remember that the distance between Ypsilanti, MI and Delta, OH is bounded below (by 65 miles)

no disrespect to charles ponzi but today's grifters would dogwalk him. they can hype, monetize and yes pivot with a skill that would have been superhuman 100 years ago

today is super bowl for the apple and honey emojis

1. Find a flat, level surface 2. Set up a vertical ruler 3. Find true North (northern hemisphere) or true South (Southern hemisphere) 4. Wait for the equinox 5. Measure the length of the shadow at solar noon 6. Record the time of solar noon (UTC) 7. Go to the MEaSURE website and submit your data

Is the Rapture happening on Tuesday or Wednesday. I’m getting conflicting intel.

assuming i didn't make any typos the blues has chromatic number 3 and 14784 three colorings sagecell.sagemath.org?z=eJyFks-Omz...

Against my better instincts, I have written some notes on how human probability judgements work and what you should expect from surveys that ask people to guess what proportion of the population is transgender. I hope never to speak of this matter again

re: homework proofs hi professor,

trans people just want to be able to live their lives and cis people are like "due to this we need to do mandatory genital inspections to children playing sports". im sorry but the problem is cis people

Me: I must deal with my fear of the symmetric group Also me: immediately crashing out because I recalled there are 24 elements just in S4

Caturday Jimmie edition

I hope you're getting your 8am scratchies

Zack, the kitten who defied Fate, is discharged from the hospital and is heading home. He looks so much like an entirely different kitten, I wasn’t even sure it was him at first. I can’t believe he made it. Thank you, Animal Emergency Hospital of Bel Air, MD for saving his life & caring for him.

I feel like part of the problem is that in the modern era, especially in the United States, people think that in order to count, they have to post about their activism or what they're doing. But here's the thing: you don't. 99% of what I do is stuff I never mention on social media.

Oh since we're talking about boycotts, way too many of y'all still eat at Chik fil A and shop at Hobby Lobby, two companies whose profits are literally dedicated to killing trans people

lol okay settle down visual metaphor

We need a term for when you are more than burned out like "perma-goo brain"or "charred husk of a person".

the fact that "collinear" is spelled that way is going to be the death of me

this is clearly a math department

GOOD NEWS! A new cancer vaccine has shown progress in triggering POWERFUL and LASTING immune responses in patients with pancreatic AND colorectal cancer. The vaccine, known as ELI-002 2P, targets mutant KRAS proteins AND had a huge impact on PREVENTING or DELAYING cancer recurrence in patients.

Happy 3²/4²/5² ! Here's a cool fact about a 3-4-5 right triangle: The circle that fits perfectly in a 3-4-5 right triangle has an area of pi square units! Here's why.

Ezra Klein shut the fuck up challenge

Avery Mann, 38, fell into a deep despair after being diagnosed as autistic last year. Now that she has gotten the help she needs, cleaned out the winter sales at Lucy & Yak, and decided to make labradoodles “her thing”, she says she is “all better now”.

honk shoo mimimi

AAAAAAAAAAAAAAAAAAAAAAHH

time for a pitched battle with my nemesis, canvas speedgrader

Your email finds me deeply burned out and disassociating.

Create crochet granny squares for a community math/art project! Our Granny Life motif-generating app can now export printable pattern pages ❤️ www.mathgrrl.com/granny-life @geek @crochet 🧶

WE DONT GOTTA TAKE IT

with every sign error I rue I miss you, characteristic 2 - but for equations of 2nd degree, I prefer others infinitely oh characteristic 2 where love & hate are equal states oh characteristic 2 my work in you is negative n positive too that even prime! how odd to suffer when we touch the divine

noodle update

Would you like some good news? This guy just left with a nice man and his 3-year-old son to go meet the rest of the family and try out their house as a potential forever home. 🥹

A fun cube dissection. #mathsky #mathart

All I saw was cheesecake boat and ocean for at least 5 minutes

After @glitch.com shut down hosting, the Permutation Group Visualizer is back up at permutation-groups.netlify.app!

by the way the problem was, obviously, a sign error

Wanna Get Away? Come escape with us to #FridayNightZillow, back for tonight, hopefully to bring a smile to your face and a break from doomscrolling.

help I'm lost in projective space

First of all, anything painted by John Berkey is unfiltered imagination gasoline.

Professors don't have the mind-control indoctrination superpowers some folks seem to think we do. We can't even get students to read the syllabus.

The brand-new issue of Knitty Magazine is up right now! A lovely selection of our quality FREE knitting (and a little crochet) patterns, each tech edited for your yarny enjoyment! Find the new issue (and 23 years' worth of back issues) here: knitty.com #ShareAndEnjoy #GladToBeOfService 🧶