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

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

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