Shun'ichi Amari

Japanese mathematician who is now the vault's uncited prior in two founding neural-network stories — which is what graduated him from a watching stub to a hub (Cali, 2026-07-15; both criteria met). The 1968 Kyoritsu book was read directly: it credits Saito's 1967 Kyushu thesis for a stochastic-descent experiment, real but without the "multilayer perceptron" framing that Schmidhuber's retelling adds — so the SGD-MLP claim gains primary support while its load-bearing wording stays single-witness and citogenesis-tainted. Separately, and on firmer footing, his 1972 IEEE associative-memory model has substantive priority over the Hopfield network and goes uncited in Hopfield 1982. Also originated the natural-gradient method.

References

• myth-amari-first-sgd-mlp (the citogenesis case) · claim-amari-1968-saito-experiment-primary-read · claim-amari-1972-associative-memory-precedes-hopfield · claim-amari-stochastic-descent-and-widrow-hoff-lms-are-sgd-siblings · claim-amari-1998-natural-gradient-fisher-steepest-descent · claim-wikipedia-amari-sgd-citogenesis
• 1977 neural-field / lateral-inhibition thread: claim-amari-1977-neural-field-paper-rooted-in-reaction-diffusion-morphogenesis-literature · claim-no-amari-1977-neural-field-application-to-morphogenesis-found · claim-wilson-cowan-and-amari-neural-field-formulations-are-the-same-object
• Related hubs: entity-john-hopfield · entity-juergen-schmidhuber · moc-backpropagation-origins