Tien "Not Closed Under Identity" Chih
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tienchihmath.bsky.social
Tien "Not Closed Under Identity" Chih
@tienchihmath.bsky.social
1K followers 640 following 1.8K posts
Assistant Professor of Mathematics at
Oxford College of Emory University. Father & Husband. Wannabe Cook. I like to teach/do/spread math as I can. https://linopt.tienchih.org/ (He/His)
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tienchihmath.bsky.social
Tien "Not Closed Under Identity" Chih @tienchihmath.bsky.social · Oct 23
Hi followers! I'm Tien Chih and I'm an Assist. Prof of Math at Oxford College of Emory. My research is about the intersections of homotopy theory and combinatorics. Just as importantly, things I'm into are undergrad research, IBL, alt grading, and supporting math teaching with tech.
Reposted by Tien "Not Closed Under Identity" Chih
prisonmathproject.bsky.social
In "A Spark in the Dark", the second installment of our "Prison to PhD Pipeline" series, Travis Cunningham recounts his first steps towards becoming a math researcher:

www.prisonmathproject.org/blog/the-pri...
The Prison to PhD Pipeline: A Spark in the Dark
a spark in the dark, travis cunningham, learning math, math solver, math project
www.prisonmathproject.org
November 11, 2025 at 8:54 PM
tienchihmath.bsky.social
Currently there are more students signed up for linear optimization than both calc 2's combined.

Not sure what this means.
November 11, 2025 at 6:35 PM
Reposted by Tien "Not Closed Under Identity" Chih
bgrueskin.bsky.social
Kyle Kingsbury is not a journalist. He is not an op-ed writer.

He is a computer safety researcher.

And he has written one of the most compelling, comprehensive accounts of the ongoing hell in Chicago that you could possibly imagine.

In under 1600 words.

aphyr.com/posts/397-i-...
I Want You to Understand Chicago Politics Chicago 2025-11-08 I want you to understand what it is like to live in Chicago during this time. Every day my phone buzzes. It is a neighborhood group: four people were kidnapped at the corner drugstore. A friend a mile away sends a Slack message: she was at the scene when masked men assaulted and abducted two people on the street. A plumber working on my pipes is distraught, and I find out that two of his employees were kidnapped that morning. A week later it happens again. An email arrives. Agents with guns have chased a teacher into the school where she works. They did not have a warrant. They dragged her away, ignoring her and her colleagues’ pleas to show proof of her documentation. That evening I stand a few feet from the parents of Rayito de Sol and listen to them describe, with anguish, how good Ms. Diana was to their children. What it is like to have strangers with guns traumatize your kids. For a teacher to hide a three-year-old child for fear they might be killed. How their relatives will no longer leave the house. I hear the pain and fury in their voices, and I wonder who will be next. Understand what it is to pray in Chicago. On September 19th, Reverend David Black, lead pastor at First Presbyterian Church of Chicago, was praying outside the ICE detention center in Broadview when a DHS agent shot him in the head with pepper balls. Pepper balls are never supposed to be fired at the head because they can seriously injure, or even kill. “We could hear them laughing as they were shooting us from the roof,” Black recalled. He is not the only member of the clergy ICE has assaulted. Methodist pastor Hannah Kardon was violently arrested on October 17th, and Baptist pastor Michael Woolf was shot with pepper balls on November 1st. Understand what it is to sleep in Chicago. On the night of September 30th, federal agents rappelled from a Black Hawk helicopter to execute a raid on an apartment building on the South Sho…
November 9, 2025 at 8:49 PM
tienchihmath.bsky.social
*Westside Gunn voice* “YOU EVER COOK A HEAD OF GARLIC IN THE AIR FRYER?” (AIIIIIIRR FRYYYYYYYYEEEEEREER)
Roasted head of garlic wrapped in foil in an air fryer.
November 9, 2025 at 10:21 PM
Reposted by Tien "Not Closed Under Identity" Chih
ryan.blacksky.app
Already run into kids who, when seeing my wildlife photos, exclaim 'that's AI'
susannashore.bsky.social Susanna Shore, Author @susannashore.bsky.social · 7d
I spotted this on Mastodon and I find it horrible, not least for the speed with which this has happened.
A post on Mastodon by small cypress (@small_cypress@indieweb.social): As an art teacher I was worried AI would come up as an issue of "why should I learn how to draw when I can use AI instead." But the real issue is that my middle schoolers CONSTANTLY believe all art I show them is AI. Digital art. Photography. Oil paintings from the Western canon. "A human couldn't do that" Being convinced that humans can't make great art is kind of terrifying
November 9, 2025 at 1:02 PM
Reposted by Tien "Not Closed Under Identity" Chih
code4math.org
Mathematicians discount the power of social media tech to communicate our work at our own peril. 😮 Looking forward to seeing @mathandcobb.bsky.social share about Math in the Age of Social Media this Monday at 3pm Eastern!

Join the conversation on our Zulip! code4math.zulipchat.com#narrow/chann...
November 8, 2025 at 10:25 PM
tienchihmath.bsky.social
I’m not a physicist, I understand that time is malleable, but if told one’s meds are ready in 15 minutes, after a 15 minute wait, it shouldn’t be 20 minutes then.
November 8, 2025 at 11:12 PM
Reposted by Tien "Not Closed Under Identity" Chih
eewash.bsky.social
i can foresee no issues with uncritically and immediately adopting this practice. only good things will follow
November 7, 2025 at 8:22 PM
Reposted by Tien "Not Closed Under Identity" Chih
clontz.org
Tell your friends! Warn your enemies! @mathandcobb.bsky.social will be sharing his take on Math in the Age of Social Media on Monday at the next @code4math.org Convening! Join the conversation on our Zulip:

code4math.zulipchat.com#narrow/chann...
November 6, 2025 at 4:57 PM
tienchihmath.bsky.social
Accepted.
November 6, 2025 at 2:59 PM
tienchihmath.bsky.social
I think I'm going to go insane.
marklemley.bsky.social Mark Lemley @marklemley.bsky.social · 6d
Australia has so much electricity from solar power that it is going to start offering free electricity to everyone for at least three hours during the day as the wholesale price of power goes negative

electrek.co/2025/11/04/a...
Australia has so much solar that it's offering everyone free electricity
Australia's extensive solar power penetration makes so much energy that the government wants to offer free electricity at peak hours.
electrek.co
November 6, 2025 at 1:55 PM
Reposted by Tien "Not Closed Under Identity" Chih
josephorourke.bsky.social
*The Mathematics of Origami*.
Expected online publication date: December 2025. Print publication: 31 December 2025.
www.science.smith.edu/~jorourke/Ma...
#MathSky #Mathematics 🧪 #Geometry #Origami #MathArt
Cover: The Mathematics of Origami
November 5, 2025 at 3:01 PM
tienchihmath.bsky.social
F5ing that editorial manager.
November 5, 2025 at 4:16 PM
Reposted by Tien "Not Closed Under Identity" Chih
seeshespeak.bsky.social
Mamdani got a humanities degree.

His win helps to illustrate that one of the central forces driving higher ed’s dissolution of the humanities is the fear that teaching people how power works can also lead to their interest in seizing it on behalf of the less powerful.
November 5, 2025 at 3:42 PM
Reposted by Tien "Not Closed Under Identity" Chih
moiradonegan.bsky.social
For years, but especially for the past year, Democrats have been in thrall to the idea that they need to chase an imagined median voter, and adopt that voter’s positions. Mamdani’s victory shows another way: hold principles, and persuade people to share them.
November 5, 2025 at 6:13 AM
Reposted by Tien "Not Closed Under Identity" Chih
mathtech.org
Join the conversation! Our community of over 100 mathematicians and friends discussing open source math education can be found on Discord.

Easy link: mathtech.org/chat

#MathSky #MTBoS
MathTech.org
Showcasing open-source technologies that innovate mathematics education and communication.
mathtech.org
October 31, 2025 at 5:16 PM
Reposted by Tien "Not Closed Under Identity" Chih
mathtech.org
Guest poster @mitchkeller.phd shares with us how to make partially handwritten slides accessible! 👀

mathtech.org/2025/10/27/a...
Making Partially-Handwritten Slides Accessible
The Problem As instructors work to make digital course materials accessible to individuals who use screen reader technology, a common question is how to approach slides. One common instructional stra...
mathtech.org
October 31, 2025 at 5:22 PM
Reposted by Tien "Not Closed Under Identity" Chih
abradacabla.bsky.social
Once more, for old times’ sake
November 5, 2025 at 2:28 AM
Reposted by Tien "Not Closed Under Identity" Chih
leximcmenamin.com
I am no longer employed so I'm not blogging Zohran tonight but I can just repeat exactly what I said in June :-)

he won on the back of a pro-migrant, pro-trans, pro-working class campaign. and also: Dem pundits are full of shit
The Democratic Party Needs to Learn from Zohran Mamdani's Guts and Backbone
Zohran Mamdani did something different, and it made all the difference.
www.teenvogue.com
November 5, 2025 at 2:29 AM
tienchihmath.bsky.social
www.youtube.com/watch?v=vk60...
JAY-Z - Empire State Of Mind ft. Alicia Keys
YouTube video by JayZVEVO
www.youtube.com
November 5, 2025 at 2:50 AM
tienchihmath.bsky.social
Char-siu ribs.
Marinated ribs Ribs in baking sheet Cooked ribs Sliced ribs
November 4, 2025 at 11:24 PM
tienchihmath.bsky.social
🤔
1. Using what you have learned about multiplication and division, create 4 word problems that includes multiplication or division. Solve each and show your work. 2. Additional Practice- IXL Math on Launchpad Example of word problem: Jamie had 16 cookies to share with friends. If she has 3 friends, how many cookies will each person get? 16 divided by 4 equals 3 (16/4=3) Show a strategy used to solve: 4x__=16 (related facts) ● Strategies: related facts, equal groups, arrays, repeated subtraction Answer- 3 cookies *Use notebook paper to complete this assignment.
November 3, 2025 at 10:32 PM
Reposted by Tien "Not Closed Under Identity" Chih
lswisnom.bsky.social
Academics in Assyria in the 7th c BC complain that admin is preventing them from doing research and teaching
November 3, 2025 at 10:04 AM
tienchihmath.bsky.social
So here's a question for people who have seen The Wire up through Season 3, and know math, spoilers below.
November 3, 2025 at 1:15 AM
Reposted by Tien "Not Closed Under Identity" Chih
douglasmack.bsky.social
doing archival research and happened across this story from 1963

teacher builds lessons around different perspectives, conservative families (backed by john birch society!) object, student *records* teacher in attempt to get her fired

sounds familiar!

p. 73 here:
books.google.com/books?id=Rkk...
Crucial Issue Splits a Town: Should School Be a Forum for Free Ideas? HELL BREAKS LOOSE IN PARADISE Screenshot of page from Life magazine; full text in story linked in post
November 1, 2025 at 2:31 PM