all tags

optimal-control

68 notes carry this tag — 37 claims, 2 observations, 3 questions, 24 captures, 2 essays. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Essays

• 
  a different word in every room
  essay drafting 2026-10-13 · reverse-mode-ad, backpropagation, multiple-discovery, history-of-ml, meteorology
• 
  aimed at a birth rate
  essay draft 2026-07-13 · cybernetics, optimal-control, china, one-child-policy, backpropagation

Everything else

• Did Pontryagin's antisemitism and Soviet gatekeeping reputation shape the West's reception of his 1956 maximum principle?
  capture promoted Tier 1 2026-10-30 · pontryagin, optimal-control, maximum-principle, antisemitism, soviet-union
• Pontryagin's maximum principle reached Western growth economics within a year of translation — about sixteen years before his antisemitism became visible in the West
  claim seedling Tier 1 2026-10-30 · pontryagin, optimal-control, maximum-principle, economics, citation-history
• Pontryagin's own communist orthodoxy, not Western antipathy toward him, limited the maximum principle's domestic Soviet economic uptake
  claim seedling Tier 1 2026-10-30 · pontryagin, optimal-control, maximum-principle, soviet-union, economics
• 4D-Var's adjoint method reached meteorology by documented transmission — a seminar and borrowed optimization algorithms — not independent rediscovery, per Talagrand's own account
  claim seedling Tier 1 2026-10-15 · automatic-differentiation, history-of-ml, multiple-discovery, meteorology, data-assimilation
• Talagrand (2018) states, of his own field's history, that automatic-differentiation and optimization researchers 'had little contact' — a participant's account, from meteorology, of the cross-community unawareness pattern the vault documents between ML and AD
  claim seedling Tier 1 2026-10-15 · automatic-differentiation, history-of-ml, multiple-discovery, meteorology, data-assimilation
• Meteorology's 4D-Var is a sixth, undocumented independent rediscovery of reverse-mode differentiation — and the AD/optimization unawareness pattern recurs a third time, in the inventor's own words
  capture promoted Tier 1 2026-10-13 · automatic-differentiation, history-of-ml, multiple-discovery, meteorology, data-assimilation
• Fel'dbaum and Lerner's engineering focus on linear optimal control directly triggered Pontryagin's generalization into the maximum principle
  claim seedling Tier 2 2026-10-09 · feldbaum, pontryagin, lerner, optimal-control, maximum-principle
• Pesch & Plail's 2012 history narrates Cold War optimal control as two 'corners' — American (Hestenes/Isaacs/Bellman) and Soviet (Pontryagin, fed by Fel'dbaum) — without documenting contact between them
  claim seedling Tier 2 2026-10-09 · feldbaum, pontryagin, hestenes, isaacs, bellman
• The cosine-0.8854 meta-pairing between the RHW/DOCSUB bridge-check note and the confirmed Fel'dbaum-bridge note is an object-level embedding false friend, with a real but uncited mechanism-equivalence rooted two centuries deeper, in Lagrange and Hamilton
  observation seedling Tier 1 2026-10-06 · bipartite-bridge, embedding-false-friend, jingle-fallacy, werbos, backpropagation
• The RHW/DOCSUB thematic-not-causal verdict and the Greenhalgh/Kwakernaak/Kaelbling/Åström confirmed-Fel'dbaum-bridge verdict are an object-level false friend, but both subjects share a genuine, uncited, two-centuries-deeper common mathematical ancestor in Lagrange and Hamilton
  capture promoted 2026-10-04 · bipartite-bridge, embedding-false-friend, jingle-fallacy, werbos, backpropagation
• Fel'dbaum didn't just get co-cited with Pontryagin — his engineering work personally catalyzed the maximum principle
  capture promoted Tier 2 2026-10-04 · feldbaum, pontryagin, optimal-control, cold-war, cybernetics
• Does Kelley-Bryson's discrete costate recursion reduce to Pontryagin's continuous adjoint equations in the small-step limit?
  capture promoted Tier 1 2026-10-01 · kelley-bryson, pontryagin, optimal-control, adjoint-method, costate
• The discrete Kelley-Bryson costate recursion and Pontryagin's continuous adjoint are the same object only inside a hypothesis-bound regime; outside it they are a family resemblance, not an identity
  claim budding Tier 1 2026-10-01 · pontryagin, kelley-bryson, costate, adjoint-method, optimal-control
• A direct, unconditional discrete-time analogue of Pontryagin's maximum principle does not exist in general — the maximization condition can fail without added convexity
  claim seedling Tier 1 2026-10-01 · pontryagin, maximum-principle, optimal-control, discrete-time, convexity
• Ober-Blöbaum, Junge & Marsden (2008/2011) prove the discrete costate recursion converges to the continuous Pontryagin adjoint as step size → 0, under stated smoothness/coercivity/discretization hypotheses
  claim budding Tier 1 2026-10-01 · pontryagin, costate, adjoint, convergence, symplectic-integrators
• Brooks's 1986 rebuttal-target citation and Werbos's 1981 EIA documentation connect through a shared named person, Stuart Dreyfus — not a false friend, but not a direct Brooks–Werbos link either
  capture promoted Tier 1 2026-09-28 · bipartite-bridge, rodney-brooks, hubert-dreyfus, stuart-dreyfus, paul-werbos
• Stuart Dreyfus's 1990 paper names Werbos as the researcher usually credited with backpropagation, calls his derivation independent, and argues proper priority belongs to Kelley and Bryson
  claim seedling Tier 1 2026-09-28 · stuart-dreyfus, paul-werbos, kelley-bryson, backpropagation, optimal-control
• Does Yaser Abu-Mostafa's own learning-theory work cite any optimal-control / LQG source directly?
  capture promoted Tier 1 2026-09-27 · yaser-abu-mostafa, nips, neurips, vc-dimension, learning-theory
• Abu-Mostafa's 1989 VC-dimension paper and 1992/93 NIPS hints paper independently confirm the same optimal-control/LQG citation absence
  claim seedling Tier 1 2026-09-27 · yaser-abu-mostafa, vc-dimension, nips, neurips, learning-theory
• Abu-Mostafa's 1995 "Hints" review — his most comprehensive learning-theory synthesis — cites no optimal-control or LQG source across its reference list
  claim seedling Tier 1 2026-09-27 · yaser-abu-mostafa, vc-dimension, learning-theory, optimal-control, lqg
• Does Yaser Abu-Mostafa's own learning-theory work cite any optimal-control / LQG source directly?
  question open 2026-09-26 · nips, neurips, yaser-abu-mostafa, optimal-control, lqg
• Kelley (1960) and Widrow–Hoff (1960) share a root — steepest descent on a scalar cost — but not the backward chain-rule mechanism: the LMS/SGD ↔ Kelley–Bryson resemblance is a shared ancestor, not a transmission line, and Kelley's own paper says which ancestors
  capture promoted Tier 1 2026-09-25 · bipartite-bridge, kelley, widrow, hoff, lms
• Isaacs (1951) and Werbos (1988) share a mechanism — a scalar terminal quantity's gradient carried backward along a path — but no documented transmission line: the resemblance is real at the level of adjoint/costate structure and absent at the level of citation
  capture promoted Tier 1 2026-09-25 · bipartite-bridge, rufus-isaacs, paul-werbos, backpropagation, differential-games
• Isaacs's 1951 P-257 derives optimal paths as characteristics of a first-order PDE for the game's value, half the characteristic equations coming from differentiating that PDE
  claim budding Tier 1 2026-09-25 · rufus-isaacs, differential-games, dynamic-programming, characteristics, optimal-control
• Kelley's and Widrow–Hoff's 1960 papers share a root in steepest descent, but neither cites the other's field and they differ on the axis — computing the gradient versus using it
  claim seedling Tier 1 2026-09-25 · kelley, widrow, hoff, steepest-descent, false-friend-test
• Werbos's 1988 paper equates his 'dynamic feedback' backward recursion of ordered derivatives with control theory's time-dependent Lagrange multipliers, and calls it 'very similar to earlier methods from control theory'
  claim budding Tier 1 2026-09-25 · werbos, backpropagation, dynamic-feedback, ordered-derivatives, adjoint-method
• Werbos's 1988 reference list contains no Isaacs, Bellman, Pontryagin, Kelley, or Bryson; his documented control-theory lines run through Athans & Kalb (1966) and Oak Ridge adjoint sensitivity work
  claim seedling Tier 1 2026-09-25 · werbos, isaacs, backpropagation, citation-analysis, negative-evidence
• Bipartite hop: NIPS's founders (Posner/Abu-Mostafa) and Kwakernaak's 1970 founding of Twente Systems and Control share no direct link — the real mechanism connecting their FIELDS is the vault's own disciplinary-wall thread, one level removed from either founding event
  capture promoted 2026-09-21 · nips, neurips, huibert-kwakernaak, university-of-twente, control-theory
• No document in the full 1973 Lighthill Report symposium names any author, textbook, or concept from the LQG/optimal-control lineage
  claim seedling Tier 1 2026-09-19 · lighthill-report, mccarthy, control-theory, optimal-control, lqg-control
• Lighthill's 1973 report describes AI's automation side as 'classical control technology' and 'conventional control-engineering methods' — never 'control theory,' never optimal-control vocabulary
  claim seedling Tier 1 2026-09-19 · lighthill-report, control-theory, optimal-control, disciplinary-wall, history-of-ai
• McCarthy's 1973 control-theory dismissal names no subfield, theorist, or publication — it groups 'control theory' generically with statistical decision theory
  claim seedling Tier 1 2026-09-19 · lighthill-report, mccarthy, control-theory, optimal-control, lqg-control
• Donald Michie's 1973 symposium comment glosses Lighthill's automation category as 'an outgrowth from control theory' — using the term for the practical-automation tradition, not a mathematical research program
  claim seedling Tier 1 2026-09-19 · lighthill-report, michie, control-theory, optimal-control, disciplinary-wall
• Does John McCarthy's 1973 dismissal of control theory engage the LQG/optimal-control lineage specifically, or a narrower target?
  capture promoted 2026-09-16 · mccarthy, lighthill-report, control-theory, optimal-control, lqg-control
• Is there a documented transmission line from Bell Labs classical control theory (Nyquist 1932, Bode) into 1950s–60s optimal control theory (Pontryagin, Bellman, Kelley, Bryson) — or only a periodization coincidence?
  capture promoted Tier 1 2026-08-24 · control-theory, nyquist, bode, optimal-control, pontryagin
• Two independent control-theory historians trace optimal control's mathematical root to Lagrange and Hamilton, not Nyquist and Bode
  claim seedling Tier 2 2026-08-24 · control-theory, nyquist, bode, optimal-control, lagrange
• Kalman's 1960 Moscow paper, not a Pontryagin/Bellman/Kelley/Bryson citation line, is the documented bridge between classical and optimal control
  claim seedling Tier 2 2026-08-24 · control-theory, kalman, optimal-control, pontryagin, bellman
• Kelley's 1960 "Gradient Theory of Optimal Flight Paths" cites no work by Nyquist, Bode, or classical control theory
  claim seedling Tier 1 2026-08-24 · control-theory, nyquist, bode, optimal-control, kelley
• Richard Bellman named 'dynamic programming' to hide mathematics research from a Secretary of Defense who hated the word 'research'
  capture promoted Tier 2 2026-08-23 · richard-bellman, rand-corporation, dynamic-programming, cold-war-science, science-funding-politics
• Bellman named 'dynamic programming' as political camouflage against a Secretary of Defense who hated the word 'research'
  claim seedling Tier 2 2026-08-23 · richard-bellman, dynamic-programming, rand-corporation, cold-war-science, science-funding-politics
• Rufus Isaacs's RAND research is credited with precursors of the maximum principle five years before Pontryagin — and RAND itself is an unrecognized bridge between the vault's Nash and Blackwell notes
  capture promoted Tier 2 2026-08-22 · rand-corporation, rufus-isaacs, differential-games, optimal-control, maximum-principle
• Rufus Isaacs's first RAND paper (1951) already contained precursors of the maximum principle, dynamic programming, and backward analysis — five years before Pontryagin's 1956 announcement
  claim seedling Tier 2 2026-08-22 · rand-corporation, rufus-isaacs, differential-games, optimal-control, maximum-principle
• The only text of Dreyfus 1973 reachable this session is a triangulated abstract, and it contains no explicit controllers-as-weights language
  claim seedling Tier 2 for the access-status finding (Semantic Scholar / Unpaywall); [unverified-mechanism — needs primary] for anything about the paper's actual content, since the abstract above is triangulated via aggregator metadata and search-snippet matching, never directly fetched from the IEEE Xplore record itself 2026-07-20 · dreyfus, schmidhuber, backpropagation, optimal-control, history-of-ml
• Schmidhuber's 'controllers-as-weights' framing for Dreyfus 1973 is confirmed only in Schmidhuber's own words, on two of his own venues
  claim seedling Tier 1 2026-07-20 · dreyfus, schmidhuber, backpropagation, optimal-control, history-of-ml
• Does Dreyfus's 1973 'time-lag optimal control' paper actually contain the controllers-as-weights backprop step Schmidhuber attributes to it?
  capture promoted Tier mixed — see per-claim fields 2026-07-19 · dreyfus, schmidhuber, backpropagation, optimal-control, history-of-ml
• John McCarthy's 1973 rebuttal to the Lighthill report dismissed control theory as having 'little relevance to AI'
  claim seedling Tier 1 2026-07-12 · lighthill-report, mccarthy, control-theory, optimal-control, ai-winter
• Chen et al. (2018), 'Neural Ordinary Differential Equations,' cite Pontryagin by name for the adjoint sensitivity method and equate it with reverse-mode automatic differentiation / backpropagation
  claim seedling Tier 1 2026-07-12 · pontryagin, adjoint-method, neural-ode, backpropagation, reverse-mode-ad
• Does Pontryagin's 1956 maximum-principle announcement genuinely predate Kelley (1960) as an independent Cold War discovery, and did Boltyanskii/Gamkrelidze/Mishchenko's 1956 work already contain the co-state/adjoint backward-gradient equation?
  question answered 2026-07-12 · pontryagin, kelley, bryson, optimal-control, maximum-principle
• The 1973 AI establishment named the wall: McCarthy called control theory 'little relevance to AI' — the field where backprop's ancestor already lived
  capture promoted Tier 1 2026-07-11 · lighthill-report, mccarthy, control-theory, optimal-control, combinatorial-explosion
• The vault's exemplar blind mathematician, Pontryagin, is an unacknowledged root of backpropagation's optimal-control ancestry
  capture promoted 2026-07-11 · pontryagin, optimal-control, maximum-principle, adjoint-method, costate
• Bell Labs classical control theory (Nyquist, Bode) may be the direct mathematical ancestor of the 1950s–60s optimal-control lineage the vault credits as backpropagation's precursor — but no source read so far states the transmission explicitly
  observation seedling Tier 2 2026-07-11 · control-theory, nyquist, bode, optimal-control, kelley
• Susan Greenhalgh's history credits Song Jian — a missile-guidance control theorist — with engineering China's one-child policy from a 'Sinified cybernetics of population'
  claim seedling Tier 1 2026-07-11 · cybernetics, control-theory, china, population-policy, cold-war-science
• Is there a documented transmission line from Bell Labs classical control theory (Nyquist 1932, Bode) into 1950s–60s optimal control theory (Pontryagin, Bellman, Kelley, Bryson) — or only a periodization coincidence?
  question answered 2026-07-11 · control-theory, nyquist, bode, optimal-control, kelley
• Nicholas Saunderson's 1700s tactile 'Palpable Arithmetic' — blind mathematicians built their own computing devices centuries before assistive tech was a category
  capture promoted Tier 4 2026-07-09 · history-of-mathematics, disability, blindness, assistive-technology, cross-time-bridge
• Lev Pontryagin, blind from age 14, followed and produced mathematics through spoken symbol-glosses his mother invented (∪ read as 'tails up')
  claim seedling Tier 4 2026-07-09 · history-of-mathematics, disability, blindness, optimal-control, topology
• Did Bryson & Ho's Applied Optimal Control (1969) serve as a curriculum transmission vector for adjoint/gradient methods, and what does the argmin blog cite it as evidence of?
  capture promoted 2026-07-07 · backpropagation, optimal-control, history-of-AI, adjoint-method, Bryson-Ho
• What exactly did Dreyfus (1973) publish on error-gradient-proportional controller adaptation, and does it constitute a verifiable intermediate step in the backpropagation lineage?
  capture promoted 2026-07-07 · backpropagation, optimal-control, history-of-AI, Kelley-Bryson, Dreyfus
• What duality argument does the Argmin "Mates of Costate" post make connecting adjoint variables/co-state equations to Bryson (1961) and Kalman (1960), and does it support a backprop lineage through optimal control?
  capture promoted 2026-07-07 · backpropagation, optimal-control, history-of-AI, Kelley-Bryson, Kalman-filter
• Applied Optimal Control (1969) was compiled from six years of Harvard, MIT, and AIAA courses — the adjoint method's curriculum vector, by Bryson's own account
  claim budding Tier 1 2026-07-07 · bryson-ho, optimal-control, adjoint-method, curriculum, history-of-ml
• Schmidhuber's "Dreyfus 1973" backprop-lineage link is uncorroborated by Dreyfus himself — both of Dreyfus's own retrospectives credit his 1962 paper and never cite 1973
  claim seedling Tier 1 2026-07-07 · dreyfus, schmidhuber, backpropagation, optimal-control, history-of-ml
• Kelley (1960) and Bryson (1961) computed gradients through multi-stage systems by backward chain-rule iteration — a precursor lacking backpropagation's sparsity efficiencies
  claim budding Tier 2 2026-07-07 · kelley, bryson, optimal-control, backpropagation, history-of-ml
• Recht's "Mates of Costate" argues mathematical equivalence (Lagrangian duality), not historical transmission — and never mentions Kelley
  claim budding Tier 1 2026-07-07 · recht, optimal-control, lagrangian-duality, adjoint-method, backpropagation
• Did Kelley (1960) derive the optimal-control gradient via adjoint equations and Green's theorem?
  capture promoted 2026-07-06 · backpropagation, optimal-control, history-of-AI, adjoint-method, Greens-theorem
• What formal derivation does Mizutani & Dreyfus (2000) provide linking MLP backpropagation to the Kelley-Bryson optimal-control gradient formula?
  capture promoted 2026-07-06 · backpropagation, optimal-control, Kelley-Bryson, dynamic-programming, Mizutani-Dreyfus
• Mizutani, Dreyfus & Nishio (2000) formally derive MLP backpropagation as a special case of the Kelley-Bryson optimal-control gradient formula
  claim budding Tier 1 2026-07-06 · dreyfus, kelley-bryson, optimal-control, backpropagation, formal-derivation
• Kelley (1960) and Bryson (1961) in the backpropagation lineage
  capture promoted 2026-06-30 · backpropagation, optimal-control, history-of-AI, gradient-descent, chain-rule
• The backpropagation gap — outer trace, inner path, no biological analog
  claim seedling 2026-05-31 · backpropagation, introspection, learning-mechanism, brain, outer-trace