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Reposted by χle Ormsby

Seema Jayachandran @seema.bsky.social · 5h

Congratulations, you're department chair.

Marjorie James Keenan @unenthusiast.com · 11h

In honour of spooky month, share a 4 word horror story that only someone in your profession would understand.

rm -rf ~/

hammancheez @hammancheez.bsky.social · 12h

"The chancellor approved it"

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χle Ormsby @motivickyle.bsky.social · 3h

Accreditation report due tomorrow

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χle Ormsby @motivickyle.bsky.social · 3h

In honour of spooky month, share a 4 word horror story that only someone in your profession would understand.

"Conditionally convergent spectral sequence"

Michael Barany @mbarany.com · 6h

exercise to the reader

Marjorie James Keenan @unenthusiast.com · 11h

In honour of spooky month, share a 4 word horror story that only someone in your profession would understand.

rm -rf ~/

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χle Ormsby @motivickyle.bsky.social · 1d

The Eighth Amendment only prohibits the government from inflicting cruel and unusual punishment.

Matt Novak @paleofuture.bsky.social · 1d

To Be or Not to Be (Lubitsch, 1942)

TrustedReveler @trustedreveler.bsky.social
LA: we will fight you.
Chicago: we will fight you.
PDX: we will make you endure week after week of of improv theater.
October 7, 2025 at 6:38 PM © Replies disabled

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χle Ormsby @motivickyle.bsky.social · 1d

This perfectly captures the PDX protest vibe right now. Not exactly a conflagration.

Photo of cross-legged person in cowboy hat playing some kind of wooden flute next to orange cones and yellow caution tape. The caption reads "Outside the ICE building, which was cordoned off during Noem’s visit."

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χle Ormsby @motivickyle.bsky.social · 1d

What's the name of the Muppets song about 1-by-1 polyominoes?
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Monomino.

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χle Ormsby @motivickyle.bsky.social · 1d

"Wood shrimp" with a risk of "strong urine" taste.... I think I'll pass.

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χle Ormsby @motivickyle.bsky.social · 1d

If you put the NSF code into Fortnite it unlocks a Sethuraman Panchanathan skin.

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χle Ormsby @motivickyle.bsky.social · 1d

modulguy (pronounced like moduli)

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χle Ormsby @motivickyle.bsky.social · 1d

It is regrettable that you will have to fail all of them.

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χle Ormsby @motivickyle.bsky.social · 1d

Having a normal one.

Elaborate hand-drawn chart for a group cohomology computation.

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χle Ormsby @motivickyle.bsky.social · 2d

Reviewing old photos to ensure the new puppy is as cute as Æsop was and folks, this is going to be HARD.

Adorable prancing puppy with black head, black butt, salt and pepper body, and dipstick tail.

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χle Ormsby @motivickyle.bsky.social · 2d

Tate: How about we splice together these resolutions to get an amalgamation of group cohomology and homology? It's a little ad hoc, but —

Nikolaus-Scholze: Hold our beers.

Theorem I.4.1 of https://arxiv.org/abs/1707.01799 giving an infinity-categorical universal property for Tate cohomology.

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χle Ormsby @motivickyle.bsky.social · 2d

Hell yes. Good job Sally and MIT!

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Reposted by χle Ormsby

Laura Petto @laurarpetto.bsky.social · 2d

SALLY KORNBLUTH REJECTED THE COMPACT!! All MIT students and employees just got this email

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Reposted by χle Ormsby

Eileen Clancy 🧿 @clancyny.bsky.social · 2d

He's a mathematician!

"The Portland Chicken—Jack Dickinson, 26, of Portland—started out protesting at the Tesla dealership, also on South Macadam Avenue, in February but has switched to the ICE building."

Willamette Week @wweek.com · 2d

Jack Dickinson, 26, says “we’re winning this.”

An Interview With the Portland Chicken

Rachel Saslow

www.wweek.com

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χle Ormsby @motivickyle.bsky.social · 2d

Hear me out: Tate cohomology.

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χle Ormsby @motivickyle.bsky.social · 2d

A "yes first, details later" deal in the Middle East will certainly work out, no problems. In fact, I'm completely unconcerned about the details — certainly no devils therein.

NYT headline: How Jared Kushner, a Self-Described ‘Deal Guy,’ Helped Broker a Gaza Breakthrough

Trained in New York City real estate, the president’s son-in-law had a single goal: Get to a yes first, and hash out the details later. “It’s just different being deal guys — just a different sport,” he said.

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χle Ormsby @motivickyle.bsky.social · 2d

I've toured Reed's reactor and one of the Nuclear Safety Administration rules is that an extra person always be present in case of an emergency. As such, there's always a student in the reactor control room wearing name badge reading "Warm Body".

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χle Ormsby @motivickyle.bsky.social · 2d

The local Fox affiliate just ran this story on a visit to the reactor: www.kptv.com/video/2025/1...

Reed College nuclear reactor visit

The Reed Research Reactor at Reed College in SE Portland, was established in 1968. Throughout that time, it has been a home for training, research and educational projects. One of the key components o...

www.kptv.com

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χle Ormsby @motivickyle.bsky.social · 2d

It's endlessly amusing to me that my office is a one-minute walk from a student-run nuclear reactor. What could go wrong???!?

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Reposted by χle Ormsby

Dave Kung @dtkung.bsky.social · 3d

Always fun to see the amazing people who win. Congrats to mathematician Lauren Williams on winning a MacArther genius grant!

www.macfound.org/fellows/clas...

Lauren K. Williams

Uncovering transformative connections between algebraic combinatorics and problems in other areas of math and physics.

www.macfound.org

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Reposted by χle Ormsby

Dave Richeson @divbyzero.bsky.social · 3d

New blog post! Through a sequence of images, I verify that the unknotting number of the connected sum of a (2,7) torus knot and its mirror is less than 6: I show that this first image is the connected sum, and after changing those crossings, it produces the unknot! divisbyzero.com/2025/10/08/t...

A drawing of the connected sum of a (2,7) torus knot and its mirror image (much modified).

An image of a crazy knot I claim is the unknot.

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χle Ormsby @motivickyle.bsky.social · 3d

The Active Calculus textbook just sent me down a fun rabbit hole.

Q: How do we know that the inverse to f(x) = x + sin(x) is not elementary?

A: Extended to the complex numbers, the inverse has infinitely many branch points!

Exercise 10 from https://activecalculus.org/single2e/sec-2-6-inverse.html.

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χle Ormsby @motivickyle.bsky.social · 3d

To be clear, this is a PDX post. Couch rhymes with hooch if you're talking about the street in NE Portland.

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