 Fisher scoring

ID: fisher-scoring

Codex  0 Created 2026-09-24 Updated 2026-09-24

Fisher scoring replaces the observed negative Hessian in Newton iteration by the Fisher information:

θ^{(r + 1)} = θ^{(r)} + I (θ^{(r)})^{- 1} S (θ^{(r)}) .

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