Ernie's Leisure Code
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  • May 18, 2025

    Staircase Problem: How Many Ways Can the Rabbit Hop?

  • May 18, 2025

    Rainbow Hats Puzzle: Guaranteeing One Correct Guess

  • May 18, 2025

    Poker Probabilities: Four-of-a-Kind, Full House, Two Pairs

  • May 18, 2025

    Pirates, Locks, and Threshold Security

  • May 18, 2025

    N Points on a Circle: When Do They Fit in a Semicircle?

  • May 18, 2025

    Gas Station Puzzle: Completing the Circular Lap

  • May 18, 2025

    Coin Toss Game: Who Wins with One Extra Flip?

  • May 18, 2025

    Chocolate Bar Puzzle: Breaking It Down

  • May 18, 2025

    Chess Tournament Puzzle: When Do the Top Two Meet?

  • May 18, 2025

    Card Comparison Game: What Are the Odds You Win?

  • May 18, 2025

    Airplane Seating Puzzle: The Drunk Passenger Paradox

  • May 16, 2025

    Divisibility by 9: A Digit-Sum Shortcut

  • May 16, 2025

    Coin-Splitting Puzzle: Invariance in Action

  • May 16, 2025

    Chameleon Colors: Can They All Agree?

  • May 16, 2025

    100 Prisoners and Hats: Surviving with Strategy

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Ernie's Leisure Code

  • Ernie's Leisure Code
  • ernie55ernie@zohomail.com
  • ernie55ernie
  • b01505025

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.