---
title: "Jürgen Schmidhuber"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Jürgen Schmidhuber"
aliases: ["J. Schmidhuber"]
first_seen: "2026-06-26T00:00:00.000Z"
witness_caveat: "TRAVELS WITH EVERY CITATION (Cali ruling, 2026-07-07): Schmidhuber is the vault's most-used witness for deep-learning history AND a documented advocate for a specific historiographic narrative (non-Anglophone credit recovery). His claims circulate into tertiary sources that then appear independent — demonstrated citogenesis in the Amari case (shared citation error + misspelling in two Wikipedia articles). Rule: his testimony gets corroborated, never copied; claims resting on him alone stay single-witness."
connects_to: ["deep-learning historiography","Seppo Linnainmaa","Shun'ichi Amari (contested claims)","priority disputes"]
seek_code_commit: "7d6d9ed"
---


Director at IDSIA; LSTM co-inventor; prolific historian-advocate of deep
learning's origins (who-invented-backpropagation.html, annotated-history
arXiv:2212.11279). For this vault he is primarily a WITNESS — domain-expert,
Tier 2 on his own pages — whose historiography is load-bearing for the
backprop-origins cluster and must be independently corroborated per the
frontmatter caveat.

## References
- [[myth-amari-first-sgd-mlp]] (the citogenesis case) · [[myth-werbos-invented-backpropagation]] · [[claim-linnainmaa-field-numerical-analysis]] · [[claim-linnainmaa-thesis-identity]] · [[moc-backpropagation-origins]]

## Updates
- 2026-08-29: His oft-quoted "the chain rule (1676), the first NNs (circa
  1800), the first practical AI (1914)…" timeline phrase turns out to be
  drawn from his Abstract's compressed summary sentence, not from the
  paper's own section headings ([[claim-schmidhubers-timeline-phrase-comes-from-abstract-not-section-headers]]),
  and he hedges comparable priority claims inconsistently within the same
  document — unhedged for the 1914 Torres y Quevedo "first practical AI"
  claim, hedged ("perhaps") for Jacquard's loom programmers
  ([[claim-schmidhuber-1914-torres-y-quevedo-claim-unhedged-vs-jacquard-hedge]]).
- 2026-09-22: a second, different-in-kind instance of the same unflagged
  pattern — his chain-rule sentence ("It is quite remarkable that he is
  also responsible for the chain rule, foundation of 'modern' deep
  learning") states a category projection onto Leibniz's 1676 work with
  the same unhedged declarative confidence as the document's verifiable
  dates, never marking "deep learning" as a retrospectively applied label.
  Read against Nicely's 2011 FAQ, which does draw that line for its own
  memory-based claims, this is Skinnerian prolepsis (category-projection)
  left unflagged, distinct from the Torres y Quevedo case (a priority
  claim inconsistently hedged). See
  [[observation-schmidhuber-nicely-cosine-088-pairing-is-analytical-contrast-not-evidentiary-bridge]].