Allen Downey
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allendowney.bsky.social
Allen Downey
@allendowney.bsky.social
Former professor at Olin College, principal data scientist at PyMC Labs, author of Think Python, and Probably Overthinking It -- blog and book -- and stark raving Bayesian.
The newest chapter of Think Linear Algebra is up now!

It is about least squares regression, QR decomposition, and orthogonality:

allendowney.github.io/ThinkLinearA...
October 29, 2025 at 2:30 PM
I just posted a new chapter of Think Linear Algebra.

It's about projection, rejection, rotation, and pool!

allendowney.github.io/ThinkLinearA...
October 19, 2025 at 5:54 PM
I have published five new chapters of Think Linear Algebra!

Read about the project here
allendowney.com/blog/2025/09...

Or jump straight to the book
allendowney.github.io/ThinkLinearA...

And now… Asteroids!
September 22, 2025 at 2:41 PM