Matthew Cushman
@astragalus.bsky.social
Adjunct math prof at Hunter College in NYC. Lefty. Kindness is the only thing that matters.
Projection of a 120-cell (aka hyper dodecahedron) I made with Zometool
October 4, 2025 at 1:52 AM
Projection of a 120-cell (aka hyper dodecahedron) I made with Zometool
Speaking of topology pictures have you ever seen the book "A Topological Picturebook" by George K. Francis? GET THIS BOOK! You are gonna lose your mind. Here's a random sample to give you a taste
September 25, 2025 at 10:33 PM
Speaking of topology pictures have you ever seen the book "A Topological Picturebook" by George K. Francis? GET THIS BOOK! You are gonna lose your mind. Here's a random sample to give you a taste
Behold the Linky, a fine loafus
September 20, 2025 at 2:42 AM
Behold the Linky, a fine loafus
Fave dude near me at the protest yesterday. NYC always comes through!
February 18, 2025 at 3:08 PM
Fave dude near me at the protest yesterday. NYC always comes through!
Here's the "Capital One Café" I passed the other day on 34th st, Manhattan. As sad and dystopian as it is to have this instead of a real cafe, I guess it's better than just having an empty bank. Public space is rare in NYC so I'll take it.
January 10, 2025 at 11:35 PM
Here's the "Capital One Café" I passed the other day on 34th st, Manhattan. As sad and dystopian as it is to have this instead of a real cafe, I guess it's better than just having an empty bank. Public space is rare in NYC so I'll take it.
Why does this have to be the subobject classifier for the topos of directed multigraphs
December 11, 2024 at 9:01 PM
Why does this have to be the subobject classifier for the topos of directed multigraphs
This is what proofs look like nowadays (from Kashaev "A Course on Hopf Algebras"). The woke young people don't want to write formulas any more
July 2, 2024 at 5:22 PM
This is what proofs look like nowadays (from Kashaev "A Course on Hopf Algebras"). The woke young people don't want to write formulas any more
Should have a hot dog fallen on the ground
April 5, 2024 at 2:49 PM
Should have a hot dog fallen on the ground
Here's Eddie with his favorite corgi. He was a true hero, who devoted himself without hesitation to serving others in every aspect of his life, and eventually gave his life doing so. Miss you so much buddy, see you on the other side.
March 8, 2024 at 3:54 PM
Here's Eddie with his favorite corgi. He was a true hero, who devoted himself without hesitation to serving others in every aspect of his life, and eventually gave his life doing so. Miss you so much buddy, see you on the other side.
APL (kidding) - actual source code:
March 2, 2024 at 1:22 AM
APL (kidding) - actual source code:
The thing speaks for itself
January 31, 2024 at 5:24 PM
The thing speaks for itself
POV: you're trying to grade final exams but a certain insouciant little carnivorous beast has other plans
December 24, 2023 at 5:11 PM
POV: you're trying to grade final exams but a certain insouciant little carnivorous beast has other plans
This ad was recently posted to the public Facebook page of Israeli real estate firm Hari Zahav. The English translation is in the alt text. It's important not to paint any group by its most extreme members. It's also important to be aware of the existence and influence of these extremists.
December 17, 2023 at 5:21 PM
This ad was recently posted to the public Facebook page of Israeli real estate firm Hari Zahav. The English translation is in the alt text. It's important not to paint any group by its most extreme members. It's also important to be aware of the existence and influence of these extremists.
One thing Facebook has on this place: Propofol scented candle ads
November 24, 2023 at 7:38 PM
One thing Facebook has on this place: Propofol scented candle ads
Are you tired of being forced to eat food that comes in a variety of shapes and sizes? The solution is finally here!
squareat.com/pages/square...
squareat.com/pages/square...
November 15, 2023 at 4:51 PM
Are you tired of being forced to eat food that comes in a variety of shapes and sizes? The solution is finally here!
squareat.com/pages/square...
squareat.com/pages/square...
This could be us
October 14, 2023 at 4:12 PM
This could be us
Everybody stop I got a pic of Smoochie with hims little teefies sticking out
September 12, 2023 at 2:44 AM
Everybody stop I got a pic of Smoochie with hims little teefies sticking out