The HackerNoon Newsletter: Everyones Using the Wrong Algebra in AI (11/27/2025)

How are you, hacker?

🪐 What’s happening in tech today, November 27, 2025?

The HackerNoon Newsletter brings the HackerNoon homepage straight to your inbox. On this day, The Utah monolith was removed by recreationists in 2020, Hubble Space Telescope discovered the Hydrogen atmosphere in 2001, Brussels Agreement was signed in 1984, and we present you with these top quality stories. From The DIY 5G Router Hack That Turns a Raspberry Pi Into a Pocket-Sized Powerhouse to This Black Friday Holiday Season, HackerNoon Has Your Tech Marketing Covered 🎁 💚, let’s dive right in.

The DIY 5G Router Hack That Turns a Raspberry Pi Into a Pocket-Sized Powerhouse

By @janluk [ 5 Min read ] This step-by-step guide shows you how to add mobile connectivity and create a pocket-sized network powerhouse. Read More.

How We Went from 0 Followers to #1 Product of the Day on Product Hunt in 3 weeks

By @yozololo09 [ 5 Min read ] How to launch on product hunt and get good results for beginner makers. Read More.

Everyones Using the Wrong Algebra in AI

By @josecrespophd [ 9 Min read ] From Tesla phantom braking to LLM hallucinations, the root bug is first-order math. We explain how dual/jet numbers unlock scalable second-order AI. Read More.

Bitcoins November 2025 Bloodbath: Dissecting the Perfect Storm Behind the $42,000 Crash

By @sergey-baloyan [ 6 Min read ] Bitcoin has experienced one of its most dramatic corrections in recent history, plummeting over 33% from its October peak of $126,000. Read More.

This Black Friday Holiday Season, HackerNoon Has Your Tech Marketing Covered 🎁 💚

By @hackmarketing [ 6 Min read ] Get 10% off all HackerNoon services this Black Friday! Business blogging, ads, contests more. Reach 4M+ tech readers. Limited time offer. Read More.

🧑‍💻 What happened in your world this week?

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We hope you enjoy this worth of free reading material. Feel free to forward this email to a nerdy friend who'll love you for it.See you on Planet Internet! With love, The HackerNoon Team ✌️