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Andrew M. Thomas

@andymiketom.bsky.social

Assistant professor, University of Iowa. Stochastic topology, TDA, statistics and imaging. Borel measurable, PhD. Opinions expressed are solely my own and not those of my employer.

315 Followers  |  594 Following  |  43 Posts  |  Joined: 10.09.2024
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Posts by Andrew M. Thomas (@andymiketom.bsky.social)

I will never get used to the disdain our country holds for brown and Black children.

From Palestine to Iran to Sudan, we normalize the destruction of schools and hospitals and daycares. We reduce children to death tolls and their futures to rubble with no consequence or second thought.

28.02.2026 16:06 β€” πŸ‘ 7406    πŸ” 1829    πŸ’¬ 159    πŸ“Œ 56

Kansas just invalidated the drivers licenses of every trans person in the state. They’re being told to surrender their current licenses and get new ones listing their birth sex. No grace period. Get caught driving with your now-invalid license and you’re looking at jail and a fine.

26.02.2026 14:34 β€” πŸ‘ 1881    πŸ” 594    πŸ’¬ 24    πŸ“Œ 64

Oh the nerve of a Spanish language halftime show in a place called San Jose California

09.02.2026 01:28 β€” πŸ‘ 83    πŸ” 10    πŸ’¬ 1    πŸ“Œ 0
Statement from Michael and Susan Pretti
Parents of Alex Jeffrey Pretti

β€œWe are heartbroken but also very angry.

Alex was a kindhearted soul who cared deeply for his family and friends and also the American veterans whom he cared for as an ICU nurse at the Minneapolis VA hospital. Alex wanted to make a difference in this world. Unfortunately, he will not be with us to see his impact.

I do not throw around the β€˜hero’ term lightly. However, his last thought and act was to protect a woman. The sickening lies told about our son by the administration are reprehensible and disgusting. Alex is clearly not holding a gun when attacked by Trump’s murdering and cowardly ICE thugs. He had his phone in his right hand and his empty left hand is raised above his head while trying to protect the woman ICE just pushed down, all while being pepper sprayed. 

Please get the truth out about our son. He was a good man. Thank you.

Statement from Michael and Susan Pretti Parents of Alex Jeffrey Pretti β€œWe are heartbroken but also very angry. Alex was a kindhearted soul who cared deeply for his family and friends and also the American veterans whom he cared for as an ICU nurse at the Minneapolis VA hospital. Alex wanted to make a difference in this world. Unfortunately, he will not be with us to see his impact. I do not throw around the β€˜hero’ term lightly. However, his last thought and act was to protect a woman. The sickening lies told about our son by the administration are reprehensible and disgusting. Alex is clearly not holding a gun when attacked by Trump’s murdering and cowardly ICE thugs. He had his phone in his right hand and his empty left hand is raised above his head while trying to protect the woman ICE just pushed down, all while being pepper sprayed. Please get the truth out about our son. He was a good man. Thank you.

Kare 11 local news just read, in full, this statement from Michael and Susan Pretti, the parents of Alex Pretti.

"Please get the truth out about our son."

25.01.2026 00:43 β€” πŸ‘ 24928    πŸ” 12854    πŸ’¬ 200    πŸ“Œ 448

I sincerely don’t even understand how this is supposed to work. There just … won’t be an economy? We just all get infinite money? Or is AI going to cover the mortgage?

10.01.2026 15:02 β€” πŸ‘ 1504    πŸ” 183    πŸ’¬ 281    πŸ“Œ 22

We all know and love the airport as the place we go to cough on each other. But if you purchase a ticket you can also use it to get to other cities

10.01.2026 15:41 β€” πŸ‘ 1554    πŸ” 131    πŸ’¬ 24    πŸ“Œ 5
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Ex-Meta chief AI scientist Yann LeCun has Lunch with the FT and in one of those instances so rare that you know he didn't sign an NDA, says exactly why as.ft.com/r/e503690d-8...

02.01.2026 13:32 β€” πŸ‘ 4395    πŸ” 1374    πŸ’¬ 58    πŸ“Œ 143
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It’s the β€œseason of love and giving”…but this year, doesn’t it seem more like a β€œseason of fear and taking”? Like many of you, I’ve been saddened by the human impact of draconian government budget cuts and how angry many housed Americans are at unhoused Americans.

🧡 1 of 9

21.12.2025 02:51 β€” πŸ‘ 22963    πŸ” 5957    πŸ’¬ 824    πŸ“Œ 1616
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Hall of Famer Kevin Garnett is reuniting with the Minnesota Timberwolves and the Lynx in a new, all-encompassing role involving business, community efforts and content development, sources told ESPN. His long-awaited No. 21 Wolves jersey retirement will also happen in Minnesota.

18.12.2025 14:30 β€” πŸ‘ 206    πŸ” 47    πŸ’¬ 6    πŸ“Œ 52

What is the quintessential Onion headline? The strong contender that just randomly popped in my mind is "Hank Williams Jr. Honored by Institute For Football Preparedness"

19.05.2024 12:26 β€” πŸ‘ 2261    πŸ” 183    πŸ’¬ 958    πŸ“Œ 1541

It’s hard for us to understand, but paradoxically this is the goal. We need to facilitate this understanding, especially in this age of easy answers.

30.11.2025 04:51 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Mathematics is hard for mathematicians to understand too At a recent conference on mathematics in the age of automated proofs, mathematician and Fields Medalist Akshay Venkatesh presented β€œHow do we talk to our students about AI?'' He quoted an email he'd r...

Great piece by Emily Riehl on what mathematics is today: www.science.org/doi/10.1126/...

30.11.2025 04:51 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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The crisis isn’t refugees. It’s not that one person committed one tragic crime and killed one other person. The crisis isn’t that America’s 250-year old history of hosting immigrants turned out to be a mistake.

The crisis is that STEPHEN MILLER, a hateful little maggot, controls the government.

28.11.2025 13:17 β€” πŸ‘ 1354    πŸ” 238    πŸ’¬ 36    πŸ“Œ 11

I’m half competent at home if you give me 10 minutes. I’d be dead on the floor within that same time during the morning rush at any decent third wave cafΓ©.

11.11.2025 16:53 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Final Budget Reduction Plan | Budget Process | Nebraska

Friends of Stats: The U. of Nebraska-Lincoln Department of Statistics needs your help. The university's Chancellor submitted a FINAL proposal today for budget cuts (budgetprocess.unl.edu/final-budget...) that eliminates the department. 1/ #LNK #Nebraska #Huskers @amstatnews.bsky.social

11.11.2025 04:06 β€” πŸ‘ 5    πŸ” 12    πŸ’¬ 1    πŸ“Œ 2
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this rocks. when indiana edu killed the student newspaper, Purdue stepped up, printed the forbidden issue, drove it to Bloomington and stocked the boxes.

18.10.2025 18:27 β€” πŸ‘ 15553    πŸ” 4483    πŸ’¬ 15    πŸ“Œ 2

Wow. That’s really untenable when solar offers 160x on your mileage, but it’s never about efficiency.

11.10.2025 21:03 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Stunning number

11.10.2025 14:46 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Issue went away last night for me!

06.10.2025 12:39 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Also having this issue!

05.10.2025 21:23 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
In early 2025, beaver activity in the Brdy Protected Landscape Area, Czech Republic, contributed to the restoration of a wetland ecosystem. A family of beavers constructed a series of dams that coincidentally accomplished environmental goals of the Czech government, which had delayed its proposed project since 2018 for bureaucratic and financial reasons. The beaver-built dams saved the Czech government approximately US$1.2 million,

In early 2025, beaver activity in the Brdy Protected Landscape Area, Czech Republic, contributed to the restoration of a wetland ecosystem. A family of beavers constructed a series of dams that coincidentally accomplished environmental goals of the Czech government, which had delayed its proposed project since 2018 for bureaucratic and financial reasons. The beaver-built dams saved the Czech government approximately US$1.2 million,

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imagine if a family of beavers randomly showed up right now and finished whatever thing you've been putting off

22.09.2025 21:41 β€” πŸ‘ 6331    πŸ” 1831    πŸ’¬ 72    πŸ“Œ 224

Detroiters πŸ™Œ

13.09.2025 04:12 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Bayesian Changepoint Detection via Logistic Regression and the Topological Analysis of Image Series We present a Bayesian method for multivariate changepoint detection that allows for simultaneous inference on the location of a changepoint and the coefficients of a logistic regression model for dist...

Finally, I would also encourage everyone to take a look at Section S6 of the Supplementary Material, which contains interesting studies in the multiple changepoint setup: figshare.com/articles/dat...

Also, make sure to check out the Python package bclr on PyPI: pypi.org/project/bclr/

17.07.2025 16:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Not only do we recover the exact location of the changes, but we can uncover the nature of the changes (in which coordinates they occur) and how confident we are the changes occur in those coordinates! The paper contains a lot more examples along these lines.

17.07.2025 16:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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If we consider a 3-dimensional Gaussian series with three changes at times 120, 320 and 400 specified by


1) x_1 increases
2) x_1 decreases, x_2 increases
3) x_2 decreases, x_3 increases

we get the following results for our posterior "z-scores" of the logistic regression coordinates:

17.07.2025 16:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

This work gives one the ability to quantify the uncertainty around changes using a Bayesian approach and also leverage the inferential power of logistic regression to determine how the change occurs.

17.07.2025 16:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Thrilled to announce the publication of our article "Bayesian Changepoint Detection via Logistic Regression and the Topological Analysis of Image Series" in Technometrics: www.tandfonline.com/eprint/AYGJE...

17.07.2025 16:21 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

America is beautiful, contradictory, unfinished. I am proud of our country even as we constantly strive to make it better, to protect and deepen our democracy, to fulfill its promise for each and every person who calls it home.

Happy Independence Day. No Kings in America.

04.07.2025 16:14 β€” πŸ‘ 58544    πŸ” 9908    πŸ’¬ 973    πŸ“Œ 426
New analysis helps discern benign from malignant thyroid growths Telling the difference between benign and cancerous thyroid nodules before surgery is notoriously challenging, but a new study finds that a combination of artificial intelligence and data analysis tec...

A really nice write-up of our article can be found here: stat.cornell.edu/news/new-ana...

17.06.2025 15:40 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Persistent Homology vs. Learning Methods: A Comparative Study in LimitedΒ DataΒ Scenarios This exploratory study compares persistent homology methods with traditional machine learning and deep learning techniques for label-efficient classification. We propose pure topological approaches, i...

Other works, such as doi.org/10.2312/stag..., have found that TDA outperforms even deep learning models in data-scarce domains. Our study (above) provides more evidence for this conclusion.

17.06.2025 15:40 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0