Rare 1956 photo of C.R. Rao with R.A. Fisher, plus a Fisher-Rao geometry primer
FrnkNlsn · x · 2026-11-14
- FrnkNlsn shared a rare 1956 photo of statistician C. R. Rao with Sir Ronald Fisher.
- The accompanying image is a primer on Fisher-Rao Riemannian geometry: the metric tensor as the Fisher information metric gjk(θ), the infinitesimal length element ds² = dθᵀI(θ)dθ, and the Fisher-Rao distance defined via geodesic length.
- This information geometry underpins much of modern statistics and machine learning, connected to the Cramér-Rao lower bound.
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