Tech
Worst-Case Portfolio Optimization & Hyperbolic Graph Clustering
Table of Links Abstract and 1. Introduction 2. Financial Market Model and Worst-Case Optimization Problem 3. Solution to the Post-Crash Problem 4. Solution to the Pre-Crash Problem 5. A BSDE Characterization of Indifferences Strategies 6. The Markovian Case 7. Numerical Experiments Acknowledgments and References Appendix A. Proofs from Section 3 Appendix B. Proofs of BASDE … Read more
Georgia says Elon Musk’s America PAC violated election law
Of course, it’s the guy who constantly complains about voter fraud who may have committed voter fraud. | Image: The Verge For all his bluster about voter fraud, Elon Musk has been one of the most flagrant flaunters of US election law. Now his America PAC has been slapped with a reprimand by the Georgia … Read more
The HackerNoon Newsletter: A 2026 Outlook: Markets, Macro Turbulence, and Crypto’s Maturation (2/21/2026)
How are you, hacker? 🪐 What’s happening in tech today, February 21, 2026? The HackerNoon Newsletter brings the HackerNoon homepage straight to your inbox. On this day, we present you with these top quality stories. A 2026 Outlook: Markets, Macro Turbulence, and Crypto’s Maturation By @andreydidovskiy [ 15 Min read ] A 2026 outlook on … Read more
Google VP warns that two types of AI startups may not survive
As generative AI evolves, a Google VP warns that LLM wrappers and AI aggregators face mounting pressure, with shrinking margins and limited differentiation threatening their long-term viability.
OpenAI debated calling police about suspected Canadian shooter’s chats
Jesse Van Rootselaar’s descriptions of gun violence were flagged by tools that monitor ChatGPT for misuse.
Suspect in Tumbler Ridge school shooting described violent scenarios to ChatGPT
The suspect in the mass shooting at Tumbler Ridge, British Columbia, Jesse Van Rootselaar, was raising alarms among employees at OpenAI months before the shooting took place. This past June, Jesse had conversations with ChatGPT involving descriptions of gun violence that triggered the chatbot’s automated review system. Several employees raised concerns that her posts could … Read more
7 days until ticket prices rise for TechCrunch Disrupt 2026
Lowest ticket prices to TechCrunch Disrupt 2026 end February 27. Up to $680 off individual passes and up to 30% off group passes. Register before they go up to join 10,000 founders, tech operators, and VCs.
The Pixel 10A and Soundcore Space One are just two of the best deals this week
Welcome to the weekend, folks! The Reviews and Guides team here at The Verge is gearing up for all things Unpacked, but Samsung isn’t the only one readying new phones. Google just announced the Pixel 10A, which, for you early adopters, is already up for preorder with a $100 gift card. Elsewhere in deal land, … Read more
Build Your Own Forth Interpreter
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Aerial_Knight’s DropShot captures the thrill of skydiving and makes it stylish
I’ve always wanted to go skydiving. Aerial_Knight’s DropShot, from indie developer Aerial_Knight, lets me live out that dream – at least in a safe, virtual kind of way. It also lets me shoot bullets from finger guns, wield laser skulls, and wear cool sunglasses while I’m falling through the air. So maybe it’s better than … Read more
Unsung heroes: Flickr’s URLs scheme
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Stellantis is in a crisis of its own making
Antonio Filosa attends the presentation of the new Fiat 500 Hybrid at the Stellantis FIAT Mirafiori plant in Turin, Italy, in November of 2025. | Elisa Marchina/NurPhoto via Getty Images Demand for EVs has gone glacial, and one automaker after another is running aground: General Motors threw $7.6 billion overboard. Ford washed $19.5 billion off … Read more
The Long Shadow of a Miserly Father
:::info Astounding Stories of Super-Science February, 2026, by Astounding Stories is part of HackerNoon’s Book Blog Post series. You can jump to any chapter in this book here. The Moors and the Fens, volume 1 (of 3) – Chapter XI: The Baronet’s First-born Astounding Stories of Super-Science February 2026: The Moors and the Fens, volume … Read more
Educational Byte: Why Most Crypto Networks Have Fees?
Crypto was built to be open, fast, and available for everyone, anywhere. It’s also decentralized, with no single central party behind. Free, as in freedom. But it’s not exactly free when we talk about costs. There are fees every time you transact, even if your action isn’t a payment. Since there’s no company handling this, … Read more
The Four-Color Theorem 1852–1976
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Code has always been the easy part
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