Why it matters

Grokking illuminates learning dynamics. Understanding shapes theory.

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The architecture

Phase 1: memorization.

Long overfit training.

Phase 2: sudden generalization jump.

Grokking phasesPhase 1memorize + overfitLong trainingno test improvementPhase 2sudden generalizationPower et al. 2021; weight decay + Adam interaction; open theoretical questions
Grokking.
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How it works end to end

Power et al. 2022.

Weight decay essential.

Adam interaction key.

Circuit-level explanation emerging.