Matthew Cushman

Lol Reihan isn't muslim I went to high school with him

The Left shouldn't unleash armies of giant fire-breathing ants

someone at the pentagon frantically typing “Claude, open the strait of Hormuz for me, quickest possible strategy, make no mistakes.”

Left-exact Localizations of $\infty$-Topoi I: Higher Sheaves We are developing tools for working with arbitrary left-exact localizations of $\infty$-topoi. We introduce a notion of higher sheaf with respect to an arbitrary set of maps $Σ$ in an $\infty$-topos $...

There's a cool way of thinking about a Grothendieck topology as analogous to (a generating set for) an ideal. You think of the category of presheaves as analogous to a polynomial ring, and passing to sheaves is like quotienting by the ideal. Full story in this paper series arxiv.org/abs/2101.02791

Yes - of course you are welcome! It's kinda the blind leading the blind though because we're all still beginners when it comes to infinity categories. I will pm you a link to the algebraic topology discord where we have a channel ("infinity category learning") with the zoom info in it.

Yes! It got rereleased a few years ago and you can get a paperback copy for like 50 bucks. Actually I emailed his wife (he had passed away) because I was so obsessed with the book and apparently there is a ton of more stuff that never got printed. I hope someone can make that happen.

I have a zoom group with a buncha nerds who left academia. We've been meeting every Sunday for years and we're currently reading Higher Algebra. Being a mathematician is not the same as being an academic! There is definitely a need for awesome math tattoos! I would get this one by George K. Francis

The Most Chilling Detail in the U.S. Attack on an Iranian Naval Ship The Iranian warship was taking part in an international exercise with many other countries—including the United States.

This is a chilling crime. A shame on our country. The Iranian ship was unarmed. The US knew this. The sailors were murdered by our navy, and the survivors were left to die at sea.
newrepublic.com/post/207429/...

I'm one of those! I yearn for my ancestral homeland, half-Korea

Iran is mountainous

OpenAI led ground invasion of a place whose terrain looks like this will surely be a great success

SCIF now stands for “Some Curtains In Front”

Tweet on X by Amir Kiyae reads: Strikes on Iran appear to have hit the home where opposition leaders Mir-Hossein Mousavi and Zahra Rahnavard have been held under house arrest - both are reported safe, but their residence was damaged. Former President Ahmadineiad's home was also targeted. Israel has stated it is targeting Iranian leaders "past, present, and future." This follows previous Israeli strikes on Evin Prison. Draw your own conclusions,

Home of reformist opposition leaders from 2009 Green Movement, Mir-Hossein Mousavi and Zahra Rahnavard was also hit by Israeli/US strikes. They have been under house arrest by the regime for over a decade.

BREAKING — 51 Iranian children are dead after a strike hits Minab girls elementary school in Iran.

Palestinian villagers - a man, a woman and a baby, and a young child, raising holding their hands in the air, probably as they are forced to leave their village. Photograph taken by a Israeli soldier. Source: Haaretz/Akevot

Haaretz @haaretzcom.bsky.social with Akevot @akevabanshee.bsky.social report on a trove of archival documents, with granular detail on atrocities committed in the 1948 Nakba. Ground level documentation by soldiers demonstrate the pervasive nature of murder and expulsion of Palestinian civilians.

I guess this is related to the fact that you run into cohomology naturally when studying infinitesimal deformations? I know that Goodwillie calculus gives a sense in which (parameterized) spectra form tangent spaces to an infinity topos. Does this specialize to deformation theory?

Ah Deutsche Bank. Its reputation for sleaze is so well-deserved.

Maybe it has something to do with the way things are structured into generic/robust phenomena vs degenerate/perturbation-unstable phenomena. I'm thinking about eg intersection theory and how passing to cohomology is like assuming transversality of intersecting representatives

very important video please watch

One of the greatest bollard walks in history.
#WorldBollardAssociation

Linear algebra is a psyop by Big Field to make people think all modules are free

Try being murdered lol

Turkish Lentil Soup (Mercimek Çorbası) Turkish Red Lentil Soup (Kırmızı Mercimek Çorbası) is velvety, comforting, and nutritious! Plus, it’s so easy to make with lentils, veggies, and spices!

Hah! I literally just made the lentil soup (which I have been thinking about since I got back from Turkey lol). Here's the recipe I used. I'm eating it right now and it tastes exactly the same. I found the pul biber at whole foods ("silk chili") www.themediterraneandish.com/turkish-lent...

a drawing of a head shown in different positions. a lot of them. i mean a lot

learn how to draw heads with the loomis method then apply it by doing something like this in your preferred style. you will Learn

well i for one couldn’t be more excited for the possibilities of AI. finally a technology that answers the age old question ‘what if clippy was wormtongue’

discord: please verify your age

me: *lets out a sigh that seems to crawl out of my lungs rather than be exhaled, dense with fatigue, disappointment, so profoundly Gen X it practically hums with the ghosts of mixtapes, dial-up modems, and being told to “just deal with it”*

discord: age verified

Hunderfossen Adventure Park in Norway (Rauraggen)

A musician playing a guitar in sugarcane that is somehow in the middle of a football field

First shot: sugarcane

The backbone of Puerto Rico's agricultural economy since colonial times

Still used to make rum of course!

The Sermon on the Mount, by Beryl Lewis, before 1965, 📸 by @ScottStrazzante

Exit polls show socialist Antonio Jose Seguro has crushed the Far Right candidate Andre Ventura in Portugal’s presidential runoff.