Kevin Hartnett (@kshartnett) 's Twitter Profile
Kevin Hartnett

@kshartnett

Chief editor @stripe. Formerly math editor @quantamagazine and Brainiac columnist @bostonglobe.

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calendar_today21-07-2011 19:13:19

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Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

"You can teach a physicist finance but you cannot teach a finance person physics." Feeling grateful to the Google News algorithm for finding me this recent interview with Jim Simons, Simons Foundation. youtube.com/watch?v=QUTaQv…

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

For weeks now I've been quizzing my friends: Does it take more information to communicate the results of flipping a loaded coin or a fair coin? Glad to have had a chance to learn the answer while reporting this piece.

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

I chatted with Richard Rusczyk of AoPS (Art of Problem Solving) earlier this year and since then, I'm glad to see they've launched Beast 1, which my second-grade son loves. I also enjoyed this conversation between Richard and Erica Klarreich for Quanta Magazine.

Nautilus Magazine (@nautilusmag) 's Twitter Profile Photo

Kevin Hartnett (Kevin Hartnett) digs into the heart of Claude Shannon's theory of information from his epochal 1948 paper, "A Mathematical Theory of Communication." Click for the article, plus more from Nautilus and Quanta Magazine. bit.ly/3eRu7d6

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

Legacy newspapers are experimenting with new revenue models. Today on the Stripe Newsroom we take a look at some of the most promising approaches including tipping (The News Movement) and micropayments (Axate). stripe.com/newsroom/stori…

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

I enjoyed talking with Jeff (Gutenberg Parenthesis) Jarvis for this piece. He makes the point that newspapers need to expand the possibilities for consumer revenue sources and reduce the friction surrounding them.

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

An amazing discovery wrapped in great story that exemplifies how new knowledge lives (or almost dies) in mathematics. One of my favorite stories I've reported for Quanta Magazine.

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

Lots of tech optimizations shaping the trucking industry today. We take a look in a new piece on the Stripe Newsroom, with insights from Emily GlassbergSands, head of data science at Stripe. stripe.com/newsroom/stori…

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

Today on the Stripe Newsroom we look at how dwell is thriving with an innovative approach to digital subscriptions and brand extensions...including becoming a homebuilder itself. With quotes from Zach Klein. stripe.com/newsroom/stori…

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

The circular economy turns one industry (or person's) trash into another's treasure. Fantastic piece this morning on Stripe Newsroom featuring comments from World Economic Forum, BiaSol Foods, RÆBURN, Urban Outfitters, and more. stripe.com/newsroom/stori…

Patrick McKenzie (@patio11) 's Twitter Profile Photo

If you’d like to read more about card testing specifically, see stripe.com/newsroom/news/… It has some recent figures about the scale of the problem and some success in fighting it.

Farrar,Straus&Giroux (@fsgbooks) 's Twitter Profile Photo

Quanta Books will publish its first book in Spring 2026. Kevin Hartnett’s THE PROOF IN THE CODE is the definitive account of the birth and rise of Lean, a computer program developed by Microsoft that is transforming the enterprise of mathematics and ushering in a new era.

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

I'm excited to share that my book, "The Proof in the Code," will be the first title released by Quanta Books, a new imprint from fsg_books and Simons Foundation. It's the story of how Lean is transforming math research. Coming Spring 2026.

Kevin Hartnett (@kshartnett) 's Twitter Profile Photo

It shows. From Karri Saarinen "I believe that building companies is a kind of craft. You’re creating something one of a kind...And for most founders, it will be the only company you’ll ever build. That makes how you build just as important as what you build."