Ernie's Leisure Code
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  • May 20, 2025

    Stopping Rule Puzzle: Expected Total Die Roll Earnings

  • May 20, 2025

    Simplex Volume: Probability the Sum of Uniforms is ≤ 1

  • May 20, 2025

    Moments of the Standard Normal Distribution

  • May 20, 2025

    Minimum-Variance Hedge Ratio in Portfolio Theory

  • May 20, 2025

    First-Ace Puzzle: Expected Stopping Time in a Deck

  • May 20, 2025

    Coupon Collector Problem: Full Collection and Expected Diversity

  • May 20, 2025

    Correlation and Joint Probability Bounds: At Least One Default

  • May 20, 2025

    Cars on the Road: Poisson Probability Over Time

  • May 20, 2025

    Bus-Waiting and the Memoryless Property

  • May 20, 2025

    Broken Stick Problem: Forming a Triangle

  • May 19, 2025

    The Monty Hall Problem: Should You Switch?

  • May 19, 2025

    The Boy or Girl Paradox: Two Variants

  • May 19, 2025

    The Birthday Problem: Probability of Shared Birthdays

  • May 19, 2025

    The 100th Digit of (1 + √2)^3000

  • May 19, 2025

    Simulating a Fair Coin with a Biased One: The Von Neumann Extractor

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Ernie's Leisure Code

  • Ernie's Leisure Code
  • ernie55ernie@zohomail.com
  • ernie55ernie
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Ernie Chang is a quantitative researcher and PhD candidate working at the intersection of high-frequency trading, market microstructure, and machine learning. His work spans execution-aware alpha modeling, reinforcement learning for trading strategies, and adversarial perspectives on network security, with publications in leading IEEE venues.