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GAIL — Generative Adversarial Imitation Learning.

hard

Answer

  • Ho & Ermon 2016.
  • Similar to GAN: generator = policy π, discriminator D distinguishes agent trajectories from expert trajectories.
  • Train π to fool D via policy gradient (log D as reward).
  • Recovers expert behavior without explicit reward.
  • Extends to continuous control + high-dim states.
  • Foundation of adversarial imitation learning.
  • Modern extensions: SQIL, ValueDICE, AdVIL.
Check yourself — multiple choice
  • Random
  • GAN-like: policy π vs discriminator D distinguishing expert/agent trajectories; π trained to fool D via PG (log D as reward); recovers expert behavior without reward
  • Same as BC
  • Not real

GAIL: adversarial imitation; π vs D; log D as reward.

#offline-rl#imitation

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