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March 17, 2025 112 mins

Intro topic: Grills

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Book of the Show


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Tool of the Show

  • Patrick: 
    • Pokemon Sword and Shield
  • Jason: 

Topic: Reinforcement Learning

  • Three types of AI
    • Supervised Learning
    • Unsupervised Learning
    • Reinforcement Learning
  • Online vs Offline RL
  • Optimization algorithms
    • Value optimization
      • SARSA
      • Q-Learning
    • Policy optimization
      • Policy Gradients
      • Actor-Critic
      • Proximal Policy Optimization
  • Value vs Policy Optimization
    • Value optimization is more intuitive (Value loss)
    • Policy optimization is less intuitive at first (policy gradients)
    • Converting values to policies in deep learning is difficult
  • Imitation Learning
    • Supervised policy learning
    • Often used to bootstrap reinforcement learning
  • Policy Evaluation
    • Propensity scoring versus model-based
  • Challenges to training RL model
    • Two optimization loops
      • Collecting feedback vs updating the model
    • Difficult optimization target
      • Policy evaluation
  • RLHF &  GRPO

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