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johndcook.com

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  • Aug 15, 2026earliest in window
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johndcook.com
johndcook.com > blog > 09/09/2026 > four-colors

A 50-year-old computer-assisted proof

3+ day, 19+ hour ago   (254+ words) The idea of using computers to assist with proofs is not new. The first major computer-assisted proof was published in 1976, the proof of the four color theorem by Kenneth Appel and Wolfgang Haken. The authors reduced the proof of the…...

johndcook.com
johndcook.com > blog > 09/09/2026 > ai-multiplier

AI is an intelligence multiplier

3+ day, 20+ hour ago   (257+ words) A rising tide may lift all boats, but the AI tide lifts some boats much more than others. By all accounts, the best programmers have had the biggest productivity boost from AI. And top tier mathematicians are using AI to…...

johndcook.com
johndcook.com > blog > 09/09/2026 > formal-method-revolution

The part of Navier-Stokes no one is talking about

3+ day, 22+ hour ago   (289+ words) Yesterday OpenAI announced a proof that settled a long-standing question about the Navier-Stokes equations from fluid dynamics. The announcement has created a lot of buzz, as one would expect. But there’s an aspect of OpenAI’s work that I haven’t seen…...

johndcook.com
johndcook.com > blog > 08/27/2026 > second-solutions

Second solutions

2+ week, 2+ day ago   (239+ words) This post provides a couple examples to go along with two earlier posts. The pattern we’re illustrating is families of polynomials pn(x) that each satisfy a differential equation and a three-term recurrence. The differential equations have a second solution…...