Shun-ichi Amari on how 'do as you like' freedom birthed the math behind AI's 60 years

FrnkNlsn · x · 2026-11-12

An in-depth IT Critique interview with Shun-ichi Amari, RIKEN honorary researcher whose 1967 theory of training multi-layer neural networks via stochastic gradient descent is a source of the work behind the 2024 Nobel Prize in Physics.

Amari recounts his evacuation-era childhood, landing in a newly founded mathematical engineering course after grades slipped amid student activism, and a mentor's advice to 'stay out of academic circles and see the world'—showing how free-form learning fostered originality. He also founded information geometry, a common mathematical basis for statistics, information theory, and machine learning.

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