7.23.26 | Terence Tao discusses Jacobian Conjecture counterexample, Bento creates HTML PowerPoint, John C Dvorak passes away

This is a recap of the top 10 posts on Hacker News on Jul 23, 2026.

Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights

• (00:00) - Intro
• (00:17) - Terence Tao's ChatGPT conversation about the Jacobian Conjecture counterexample
• (01:37) - Show HN: Bento - An entire PowerPoint in one HTML file (edit+view+data+collab)
• (03:03) - John C. Dvorak has died
• (03:41) - Are AI labs pelicanmaxxing?
• (05:09) - So Reddit has decided that plain HTML is unsafe
• (06:32) - The startup's Postgres survival guide
• (07:48) - Everyone should know SIMD
• (09:20) - Making
• (10:46) - Quality non-fiction books are the antithesis of AI slop
• (12:04) - Outro

Terence Tao's ChatGPT conversation about the Jacobian Conjecture counterexample
https://chatgpt.com/share/6a5fdc7a-d6f8-83e8-bbea-8deb42cfed56
https://news.ycombinator.com/item?id=49010345

Show HN: Bento - An entire PowerPoint in one HTML file (edit+view+data+collab)
https://bento.page/slides/
https://news.ycombinator.com/item?id=49008211

John C. Dvorak has died
https://twitter.com/na_announce/status/2079952538040672302
https://news.ycombinator.com/item?id=49012070

Are AI labs pelicanmaxxing?
https://dylancastillo.co/posts/pelicanmaxxing.html
https://news.ycombinator.com/item?id=49010129

GigaToken: ~1000x faster Language model tokenization
https://github.com/marcelroed/gigatoken/
https://news.ycombinator.com/item?id=49010167

So Reddit has decided that plain HTML is unsafe
https://www.cole-k.com/2026/07/21/reddit/
https://news.ycombinator.com/item?id=49005747

The startup's Postgres survival guide
https://hatchet.run/blog/postgres-survival-guide
https://news.ycombinator.com/item?id=49005787

Everyone should know SIMD
https://mitchellh.com/writing/everyone-should-know-simd
https://news.ycombinator.com/item?id=49010648

Making
https://beej.us/blog/data/ai-making/
https://news.ycombinator.com/item?id=49008440

Quality non-fiction books are the antithesis of AI slop
https://resobscura.substack.com/p/quality-non-fiction-books-are-the
https://news.ycombinator.com/item?id=49007247